Limb fittings and riser bits wanted for academic research

[bigalpendry]

I have a student of Mechanical Engineering designing a 25 inch recurve target riser. We need old risers with International limb fittings, or the "nuts and bolts" as it were that make up limb fittings, long rod connections and other accessories (the design is based on the versatility of the good old Hoyt GM, so if anyone has a couple of those going spare it would be ideal!). I am prepared to pay a reasonable price but please remember this is an academic work hoping to break new ground in the analysis of riser dynamics (most work to date has centred around the mathematical modelling of limbs, the riser being treated as a solid body). Can you help?