Seat belt source 77 truck

Anyone know where I can find NOS or quality aftermarket seat belts sets for a 77 truck? i have the 40/2040 lil red bucket seats. my belts are nice enough, but they do not retract. it's getting really old and I'll spend the cash to make them function correctly. I found just the retractor/shoulder belt assemblies on ebay, but i would like to get everything new all at once. I will post this in truck section also. thanks, jp in the land of oz.