You can get Cobalt door handles from Amazon. Read the threads on the forum and you will find that the handles come in different configurations.
The failure mode is due to the two rear mounting thread inserts breaking loose from the handle over time. The handle body is cast and the threads are pressed into cast holes. The castings fail. As a result, the handles were redesigned to include additional structure to avoid the failure.
You can use any style handle if you fill the void with epoxy. JB Weld quick works very well. Use a popsicle stick to mix and then drizzle it into the void and the handles will not fail in the future. If your passenger door handle has failed, the drivers door needs to be addressed as well. You can pull it and apply JB Weld to avoid future failure.
The handles come in chrome, "primed" which it turns out means satin black or gray primer. The satin black are fine for long term service in my experience, but the gray handles should be painted. At least cleared if you like the gray color.
The handles are "handed". That is they only fit left or right side as the action is unique to each side. They also come with or without lock holes. Check your current handles, then order a replacement that matches, or if you are going to paint them, get a pair of primed units and have them painted, then apply JB Weld and install them. ALWAYS apply JB Weld - even if the handle is reinforced they can still fail so fill them.
When you remove the existing handles, you will need a 10mm socket and extension. Put some electrical tape across the face of the socket so the bolt is held in position while working it out of the door. If you don't do this, invariably one or more of the bolts falls out of the socket and you are fishing with a magnet to get it out of the guts of the door. I have never seen one totally lost but its a pain to go fishing for them.
The rear window is a well known issue. I have repaired three. The first challenge is make sure you have the RIGHT adhesive. Its the black, sticky window installation glue that is very challenging to work with. It does not want to flow. It wants to get onto EVERYTHING and comes off NOTHING. Great care needs to be applied to make it work. But if you take your time, have some help and are careful the repair is very effective.
Check out the threads and purchase the right glue
Purchase the window clamps. They are ESSENTIAL to success. They have suction cups on Amazon
They work very well. But they need help. I picked up a section of 1 x 1/8th aluminum bar and cut it into sections to go under the clamps across the perimeter of the window to spread the load on the canvas and get it into continuous contact with the glass.
I highly recommend that you do a dry run or two to rehearse and perfect your technique. Put the clamps on the window without tightening them. Practice how you will move the glue gun to apply a bead of adhesive around the perimeter of the window, then how you will line up the window and tighten up the clamps. It will be like a monkey making love to a football the first time you do it, thus the dry runs to perfect your technique.
The key is to get the window aligned correctly the first try once you apply the bead of glue, then have a friend tighten up the clamps while you hold the window in position.
Its tricky but it can be done. And once the glue dries, you will be happy with the results.
The TSB with more info is here