Where do I find seals for my Econoline 3 speed transmission?

Hi vanners,
I'm overhaulin' my 3.03 tranny for my '65 heavy duty. Dissambled it, checked the gears and bearings, everthings fine. I ordered a gasket and seal kit for the regular 3.03 Ford trannys but the output seal doesn't fit. The special Econoline tail housings seem to have a bigger seal than the other Ford 3 speeds.
Now I like to know where to get this extension housing oil seal. Good American quality prefered. I already checked Macs, CG and Rockauto.
Thank you all and greetings from Germany

Not sure but you may check for the seal using a truck with the 3.03 like f100

You might try Toploader Heaven---I've never used them,but I've heard that they can get anything toploader related.
Mike

How about ebay? also  likely - just remove  the old seals  & get over to a wholesale bearing house!! Only thing xtra -would be any paper seal  that might be needed ?? That seal -should have a # on it!! here - all we do is get to a bearing & seal house -yet in german land -im sure you likley have same there too!

NAPA part #16871 for tail shaft seal

Thank you all.
Seth, I didn't knew what type the F100 driveshaft is but it seems to be the same like our vans, also with the slip yoke.

Cali2chitown, thanks for the number. I think I try that part. I'm going to Cali in october and will visit a Napa shop then.

Twinpilot, I tried ebay.com but I failed. The one I got was to small. The one I removed just had the fomoco logo on it. It was hard like a rock and when I pulled it it broke into a thousend pieces. The problem here in german land is the metric system, you can't get American standard parts on every corner.

And thanks, Mike, for the adress, I put it on my list for the next tranny job.