all overpriced
Find a broken LaCiE (or similar) on ebay and swap the drive out. Try to find one with a similar capacity and obviously the same type (eSATA capable). Should be able to get something in the 20-25 range.
I have a broken LaCie, and it could fit two IDE drives. I don't have any spare IDE drives and they're phasing them out.
Price isn't a
big issue for me... if it works, and it's a bit overpriced, I'm gonna live. I'll look around on eBay, though.