If you'd like a source of nicely constructed drawer/pantry slides made to any size you need, order with confidence from
http://www.shelvesthatslide.com/sliding_shelves.htm
Because of work commitments, I didn't have time to build them myself for our new camper (put them in the pantry, in a double pots/pans/dishes cabinet, under the island sink cabinet, and also took advantage of the dead space under our range (just waiting on a pre-finished drawer from from my manufacturer). Anyway, prices were great and the trick is to order everything you need in one shot because there's greater discount in shipping for larger orders. They are well-built, and ship pretty quickly! The packaging was awesome!