I can get you started but may not be able to help you with shorter riser,
Binghams 68" take down longbow with pronounced RD at 45lbs is .290 inches measured at the thickest point without the wedge inserted.
Since I see your riser is smaller I checked the dimensions of the stock binghams sells fo their td longbow, its 1 1/2x2 1/2x17.
Thats a start, not sure about the extra couple of inches in the limbs, surely one of the other great guys here will chime in.
Regards Mike