You can find proline risers and others too. I actually have another proline riser that was on this bow. I stripped it and repainted it but it didn't turn out to well, it was gold when I got it and didn't hit me as traditional. So I stripped and painted it. Unfortunatly it pealed on me. I found the one in the pic to replace it. Much better to my eye.

As for the limbs I would make the limb first and then add the angled pad. The one thing you'd have to do is stop the fiberglass where the pad starts. I would think you could make it of any hardwood as its not going to be bending.

As for the weight of the limbs I would check binghams (Sp) projects. I'll look for the website. Anyway. they could set you up with the right stuff to get you close to the weight. As long as your close I think you can do the rest with the bolts. I do know you can sand the fiberglass some just not alot.

Like I said I'm guessing. Haven't done any fiberglass bows. I hope to change that soon.