Hi First Timer,
I feel your pain! I had DD in Feb '07, so I was pretty huge over summer and wanted a maternity swim suit. I searched everywhere- and all of those maternity shops only had old-lady type maternity cozzies that were expensive. Anyway, I ended up finding a black one-piece cozzie in BigW, and that was only about $30-$40 I think. While I was there, I also bought an un-maternity cozzie that I could wear whilst PG- it was a 2-piece that has a bikini/brief bottom and a singlet top that partially covered my belly.
I hope this helps!!!
Jess