Knape and Vogt makes some excellent drawer slides. Available everywhere from Home Depot, Home Hardware and Rona, to Amazon and ebay, and to the internet. Any retail hardware store like the aforementioned carry carry a lot of different types and lengths of ball bearing drawer slides and Windsor Plywood is also good.
Some retail stores have a better selection of things like knobs, catches and screws. I like Windsor Plywood for their stock of lots of screw sizes and types and other cabinet hardware and they also sell screws in bulk. I hate getting screws from HD because you have to buy their ridiculous "Pro Pack" of screws at 10 times the cost of bulk ones at other stores. (Sorry, bit of a rant there, lol). Lee Valley has a very good selection of cabinet hardware and they do online mail order which can help.
Knape and Vogt makes an "RV stay-close" full extension drawer slide which is really nice and is available up to 28". Just bought some for some drawers I'm going to make up for beside our bed. It locks in the closed position when you push the drawer closed. Then to unlock/open it, you give it a little tug to make it let go. No need to use those dumb little catches that just about every RV maker uses. They can be a PITA and they often come from the plant misaligned. I know that 36" might be nice, but you could find that something less than that is just fine.
Knape and Vogt stay close slidesAccuride makes slides up to 60" long.
Accuride 9301 slidesIf I can offer a tip, mount the slides by using the available rear mounting brackets. Forget about mounting them to the sides. Cabinetry in TTs is typically out of level, square and plumb. It will drive you crazy trying to put plywood on the sides of the existing cabinetry to screw the slides to (ask me how I know). The rear brackets are so much easier and its what the RV manufacturers use.
If looks and detail matter to you, you should be able to get matching drawer handles from your manufacturer via the dealer. And instead of using netting over the openings, if you go to a dealer's lot and walk through other units of the same make and model you may be able to find standard size doors that will work. Just doing that now with our latest TT. On a previous TT, I had new cabinet doors made up to fit openings but it was rather costly. You could also consider using plain 3/4" thick lumber, glue pieces together to get the dimension you need, router a round-over edge and then stain and finish to suit. You *could* make cabinet doors with a metal mesh insert, but then that's getting trickier and you need at least a table saw and biscuit joiner. Or you might be able use a stock door and replace the thin panel part in the middle with mesh. Some TTs, like ours, have some cab. doors with a mesh center ("centre" in Canada) in them.
Or just come down to Langley and I'll help you do this. :W
If you post some pics and/or a floorplan it might help for more suggestions. Is there a Komfort dealer in or near Penticton?