Just order it from Rockauto. I did mine a while back, and I'm at about 1,000 miles without issue.
BECK/ARNLEY Wheel Seal part # 0523303 (052-3303) $ 3.22
SKF Wheel Seal Wholesaler Closeout -- 30 Day Warranty part # 21281 $ 0.86
TIMKEN Wheel Bearing part # 513036 $ 31.79
The bitch part is pressing all the old stuff out, and getting the new stuff back in. You need a press and lots of patience.
From my build thread:
You have to disassemble the entire hub just to get the lug stud out. I figured this was as good a time as any to replace the wheel bearing. Here's the hub with everything removed; bearing, seals, everything pressed out.
Here's all the new stuff. It's pretty simple, just a bearing, snap ring, and 2 seals.
Aaaaaaand...everything all assembled.