Parts recommendations

Hi all, I am just starting to get to work on my 64' Valiant, 225/6 with a 904 behind it. First order of business is pulling the tranny to replace the front seal and/or front pump bushing. It was literally pouring out tranny fluid from the dust cover area while running. I have thoroughly checked every other possible location for a leak after using the search function on this great site for any other possibilities. My question is, where do you recommend picking up the parts for this fix? Wasn't sure if one brand was better than the other etc...

Thanks everyone!