I have a lot of spalted maple lumber at the house. It's one of my favorite woods. Some thin stock and some thick stock.
As I look through lots of the "stuff" at the house, I must have half a dozen turkey calls; box, slate, trumpet, you name it....made from spalted maple. I even have a Tippit knife with spalted maple scales. Smaller objects tend to be more suited to spalted maple stock that is usually available. I've seen lots of bow risers, or a portion of the risers, made from spalted maple (I've lusted over Killi's bow on Bob's web site).
The problem with spalted maple is that there usually tends to be some "punky" wood somewhere on the stock. That being said, I happen to have some stock that was destined for table legs. It is probably 3" X 3" and must be at least 4 or 5 feet long. Pretty stable wood, but it doesn't have a lot of "color", just thin pencil spalting with some curls. If you can't find anything suitable and you know someone who could rip some thin stock from it, you are more than welcome to it if you are willing to pay the shipping.