I've hared of an Italian company making carbonfiber replacement prods of 150lb draw weight for the Taiwanese crossbows, I'll need to look through my bookmarks to find it thou....on the other hand you can look into making your own
Carbon fiber is sort of an exotic material(sort of like titanium
) and has specifics in the way it is worked with and applied in composites and if I'm not mistaken it makes a very stiff limb that doesn't bend too far id used alone(not like fiberglass). This makes it a great candidate for compound bow setup where the limbs aren't that important as most work is done by the high-efficiency eccentric cams and the only thing the limbs need to do is transfer as much energy in as little time as possible to those eccentric cams.
Fiberglass is actually the primary material used for making crossbow limbs as well as other composite springs, it is more forgiving when it comes to compression as opposed to carbon, it costs less, and is much easier to work with.
Again "if I'm not mistaken
" cabonfiber is never used alone in the making of composite springs, it is mainly a "backing" material or goes in layers of various thicknesses strategically positioned in the composite sandwich when pressing composite springs.
The search will continue of coarse, but if you want to look into the process a bit - there is a topic in Technology section talking about pressing composite limbs
. >>> Pressing All-fiberglass crossbow limbs