Some supplementary experience for added info in further/future cross referencing: I have successfully used a Beck/Arnley 071-2356, which was just a rebranded Seiken "Major" kit of the same part number, in the moderately recent past. After looking for the rebuild kit again, I'm finding the the Beck/A kit is nearing impossible to find, BUT it does net you a little more love when parts interchanging.
This is just extras/last ditch, what Mike said especially regarding the seals really being the only thing you need is echoed in my experience. I thought I had a full scale Brazilian blowout on my hands when I did this. Turns out it was a just a small flat spot on the secondary cup.
Also for research purposes, there is a certain 311s organization website that has a little bit of all this info wrapped up in a single page.
Do some '411' searches here: http://www.311s.org/pmwiki-311/pmwiki.php?n=TechSection.311sPartsInterchange