I believe cocobolo is part of the rosewood family and there are several people that have a reaction to it. not sure if the same is true for bacote. They are both pretty woods though.
I searched the web and found a site that sells parts for Ryobi saws. for your model it says obsolete. but fot the next model (sc163vs) they have some. not sure if its the same size though. here is a link to that website. maybe you can find more info on it. http://www.ereplacementparts.com/ryobi- ... _8001.html
If this dont work maybe you can take the blade holder to the hardware and find thumb screws that will fit into them. sorry wish I could of been more help.
I took pictures of my wood storage, I have it wherever I have room. the little storage drawers have a lot of the smaller pieces in it. I use these for intarsia, and just can't throw them away(might need it someday)
don't mind the mess I haven't cleaned up for a while. the milk crate under the bench is for the to burn scraps.