Bradco Ground Shark oil seal and bearing assembly

Hi all, I have a Bradco Ground shark extreme duty brush cutter that is currently under repairs. The cutter assembly completely removed itself while in use and I am trying to put it back together. I think I have gathered all the parts other than the oil seal. Does anybody know a part number for the seal or where i can find one? There is limited info about the internals of the bearing assembly (unless you want to buy the whole thing for $3k). I have discovered the upper shaft bearing is a Timken 515649 and the lower shaft bearing is a Timken 716649. I can't identify the other parts I have (or don't have) but you can see in the pics what I'm working with. Thanks in advance