I am thinking Rosewood would be alright. I need something dark, with figure. I don't know if I need white or black spacers or both. I do not want plastic. It is not a classic stock, or Ebony would be the choice.My son suggested Koa, but I don't know about that. This will be a good looking gun. It is floated, so the tip will not have to support anything.
Many years back Brownell's used to sell spacer material. The wood you may want to consider is holly, instead of maple. The holly is whiter than maple, fine grained, and takes a nice finish. Very easy to work with. there are usually lots of fancy grained blocks and pieces for sale on eBay that would make great forend and grip caps.