After making knives for 17 years, I feel obligated to offer my opinion on handle material.
Some of it may seem a bit condescending, but is not meant to be that way.
1.)A person can make something small out of something big. Not the other way around. If I want to make a bowie with some drop to the handle, I need a 2" wide block. I will go to the supplier who has 2" blocks. The guy who only stocks 1.5" blocks won't do business with me. It takes very, very little more material to make material wider when you cut it up.
2.) As soon as you cut material up into scales, you lose me as a customer. (As well as a TON!! of other makers.) I build 95% hidden tang knives.
3.) I find no reason for a handle material supplier to only supply scales. If a person/maker/etc. can not cut up a block of wood into scales himself, then he has not got a clue of how to build a knife and you don't need him as a customer in the first place.
Synopsis - Sell and provide BIG BLOCKS!!
Keep it simple.