Silverton Polka (listen to the soundclip) isn't even close.

But, as I think someone else on this thread said, the name is not important. Heck, most fiddle players at the sessions I go to don't remember most of the names of tunes, they just know the tune. It's a nice tune and if you take the abc file I transcribed to Concertina.net you will have the dots (gif file) and a midi that plays a bit slower than the original recording. So just enjoy the tune. Call it the "Mudcat Polka" or whatever you like.

Cheers, S. in Seattle