Sears might have something close. You could use one of their 1/2" drive thin-wall/deep sockets. You'll still have to shave a token amount of material off the o.d. ~.025", but you should be able to do that with a grinder. You only have to shave about 1/4" to 5/16" from the end if it's an automatic. The manual yoke recess is deeper if I recall.
Here's one I did on a lathe with a 3/4" regular depth socket:
unfortunately it split when I tackled one that was on too tight with an impact wrench. If you can't get one locally, e-mail me off-line & I'll be happy to buy a cheapie at Harbor Freight and mail to you for cost plus a couple dollars.