Just happen to have a new one on the bench, laying beside my mic. So to be clear, this is the oil seal that is seated in the outer timing cover, under a circlip, that ride on the end of the crank, right? My new one is labeled p/n 04-0823. Please take these measurements as 'ballpark' since I'm not an experienced machinist and the part is rubber and easily flexed:
o.d. is 1.067"
i.d. is 0.57"
Thickness is .18"
I hope this helps!