I can't have bread, but I do use Suzie's brand "thincakes" which are like rice cakes only made with other grains (my fave is the spelt and flax). They're not quite the same as slice of bread, but they work for some things.
I also use lettuce roll-ups and cook leeks and roll them across the grain (easier to bite that way) rather than with the grain, and they are good to stuff things into. My next venture is going to be cabbage rolls stuffed with ground beef, quinoa (or rice), some Pam-fried onions and mustard - or maybe a shot of tamari. Tricky to get the weights right when weight each item separately first (veg, grain, protein), but should be doable.
I'll post a recipe if I can make it work.