Try calling Aqualand in St. Louis Park, I was in there a couple of months ago and they had a 220 and several 180s. I don't recall exactly what they were charging, but I don't recall thinking it was outragious. Also I got something from someone else for Dearborn Mi, if you feel like a drive.
952-933-2244
If you feel like driving to Dearborn, MI Jan's Tropical Fish is by far the cheapest. It's about an hour and fifteen minutes north of Toledo. My 180 gal was only $330 there. My 55 gallon sump was only 55 dollars. Talk to Leroy. Call them first and ask them prices, dimensions, etc. they have all kinds of tanks there.
313-292-3680
Hope this helps you out, make sure to post pictures of whatever you end up buying.
Nick