Hi Daryl,
I'm doing my transmission now. Bob Ziff @ AvantiParts.biz 215-420-2300 has some of these parts as does Studebaker International 317-462-3124. If you get the front and rear seals from SI have them check the rear seal number. The one I received is 1/8 inch larger diameter than the tailhousing. O'Reillys had the correct one on the shelf it is a National #7692s. The front seal is a National #6988h. I'm sure between these two you can find a new pan gasket, filter and any of other gaskets that you need.
Best of luck, John C.