Elk Hide - as used by riggers. Probably the #1 option. Design & sew your own.
UHMW Plastic - molded, & or sewn
Cloth - Especially onto the sails
, ditto for thin UHMW sheet
Spectra chafe covers, & or patches. Add to all offending bits; rigging
Rubberized plastic spreader boots
PVC - tubing or pipe. The latter can be heat molded
Smooth & mold
(by addition & subtraction of material) all sharp rigging
; ends, fittings, & bits, prior to adding other protection, such as chafe pro, or covers onto things.