So how can I reauthor this?

[Thrifty]

It seems you can't rent this on DVD.  Is there a downloadable file somewhere that I can use?

[OmegaR!]

I don't know of any downloadable sources, but the season 1 box set is $20 @ Wal Mart, or if you have access to a Hasting's, they rent TV DVD's by the disc
(but they may not have it, it depends on the store)