I've been pulling my hair out for about 3 weeks now, trying to identify a GM front hub bearing unit that I know exists, but I can't find the part number or year/model.

It's for the rear of an offroad buggy and it bolts to the trailing arm. A 33 x1.4 splines, 930 CV micro stub axle goes into the hub. I have the stub axles, but nobody will tell me which GM hub they use, not even the stub supplier!

The hub is (preferably) 5 stud (an adaptor is used to take it out to the 5/205 wide-5 wheel pattern), but a 6 stud hub would do and I can make adaptors to suit. The bolt pattern must be 4.75" or (preferably) smaller to clear the wide-5 wheel and bolts. It's non ABS too and the stub axle is 2.89" long from the bearing register to the end of the splines/start of the thread. The actual splines are 2.1" long.

Here are some Timken bearing numbers I've looked into so far that look like they might be suitable (they are all 33 splines and 5 stud), but Timken aren't much help with the spline data.

513011K
513160
515005
515017
515006
HA500100
HA590034
HA590048
HA599863

If anybody knows which year and model of truck has the correct length of spline and bolt pattern I would really like to hear from them. Some of the offroad guys here may even be using the exact same parts and might know the bearing number. TIA