after not being able to find all that stuff myself i started making my own paddle systems using kydex, t-nuts, screws and washers. comes out really comfortable, and sturdy. the pics of some older styles i have done. instead of the squared off bulky looking stops you see on these paddles i now use a smaller, lower profile round cut (halk inch round punch piece) secured with a rivet. it is much cleaner looking.
Tony