I totally sympathize with your lack of L # selection.
Last year a guy at my LFS suggested that I look on
http://www.aquabid.com. I've gotten a L47, L128, L200, L330, and a group of baby albino Bristlenoses at very good prices from aquabid dealers.
Like with every auction site, definitely be careful and read the seller's feedback before bidding. If something sounds TOO good to be true, then it probably is. Definitely ask for shipping quotes if they are not listed. Some of the people on there also have their own websites.
Good luck.
Steph
May the Force Be with You...