I agree they are really slow, but still kind of a neat talking point. My SSE has it also Cody so if you are checking JYs, don't limit your search to just SSEi. You'll want to get the accessory bag that has the hose in it to compliment the compressor. Ebay has them now and then and a member had one for sale here not long ago. Check the For Sale section.

Edit: Black94SSEi had it for sale but it is sold. Here is an Ebay link. This guy sells them on Ebay all the time. He must have quite a supply. I think you can buy direct from him also.
http://cgi.ebay.com/ebaymotors/PONTI...QQcmdZViewItem

Neat idea, yeah you could just go get a plug in pump, but then you miss out on the fun of an installation and mod!

Good luck with the mod and have fun with it. Just remember those all important magic words... "I'm sorry sir, but you can't do that". Then promptly forget them Sometimes mods aren't about what they are as much as the personal satisfaction of pulling it all together. Don't forget to take lots of pics for us.