Rear Oil Seal for 1275's???

Hi all, I smoked the old 1275 a few month ago.  It was using one qt. of
oil per 13 miles.  The old banger had piled up lotsa miles and lotsa
years so I don't feel too badly about it.  Anyway, as long as it's outa
the car for a rebuild, I'm checking to see if there's an aftermarket
rear oil seal I can install that actually works.  Any feedback on an oil
seal source and/or your experiences on this idea will be appreciated.
As always, my thanks to this awesome list!!

Jack