A sliding mechanism to repair a sliding van door can be purchased from a dealer for the vehicle in question. It is sometimes possible to find this part at an auto salvage yard.
One can find sliding door handels from online stores such as the website Amazon and the bidding website eBay. Alternatively you may purchase sliding door handles from a catalog store like Argos in the United Kingdom.
I assume you mean such as a Pocket or Hide away door? You can look on Rockler.com http://www.rockler.com/search_results.cfm?filter=pocket+door This may be some what of what you are looking for. Or if you want like a glass sliding door look here: http://www.cabinetware.com/Track.asp
There are many video sites online with "how-to" videos. A video for sliding door track installation could be found at Youtube, MetaCafe, or any of the other various online video sites.
Unless one is on eBay, your s.o.l. dealer part #.
it is under the right side back sliding door and to find the tools it is in the trunk in the bac where there is a rectangular door near the floor
You probably have a bad or sticking door ajar switch. The door ajar switches on the 1991 Accord are easy to find. On each door opening, the door ajar switch is the black plastic sliding mechanism that is located just below the metal door latches. Check to make sure that they are all sliding smoothly. If you don't here a clicking noise when you move each of them back and forth, it may be bad. If they are sticking, purchase some electronic cleaner spray and clean the switches. DO NOT use WD-40 as it will attract dirt and cause your switches to stick again.
You can GOOGLE Pontiac Door Lock and find a lot of hits. Try this one; http://www2.partstrain.com/store/ FriPilot
partstrain.com
Salvage Yard?E-Bay?
look inthe door jam of the door your working on. find the rivittward the bottom. remove the door panel, and unplug the door lockmotor. drill out the rivit and remove the motor by lifting forward and watching the hook sliding it from the door latch assembly.
go to a junk yard and find a sunfire or a Chevy cavalier take the door panel off and unbolt the window mechanism and go home and take your door panel off and replace the mechanism