Can always go to a truck shop like catco or fleet pride and have them build a drive shaft.
The only thing different between a "performance automotive" driveshaft and Richard in the industrial park who works at catco is that "performance automotive drivelines" put's a sticker on theirs.
Automotive performance drivelines are the biggest markup, no value added industry I swear in hotrodding. They do the same thing as absolutely ever town with a semi truck shop that builds dozens of driveshafts per week but charges a premium for it. They buy the same DOM tube, the same u joints, the same weld on ends, balance on the same type of machine, as everyone else.
I have a hard time believing they would have used 1310 u joints if you bought it from a performance shop.
If you have a caliper or even a tape measure, measure the cap width and diameter.
If its factory GM 90% of cars and light pickups get the 3RL in the diff, 1310 on the slip yoke. 90% of aftermarket is 1350. 1330 is a big goofy and not THAT common.
http://www.driveshaftspecialist.com/HTML Measure/UJ ID Guide.html