Good luck Mike. Macasser is very hard to find right now, especially a piece good enough and dry enough for use in a riser. Bob Morrison has stopped offering it cause he cannot get good quality. If it is not properly dryed it will check badly. Even if dryed properly checks can happen with it more so than other woods.
I was there not long ago and they had some I believe. If you find it there I would be happy to go down and take a pic as I am always looking for an excuse to go.
sounds like you're comming out west. Where you moving to?