You can support the owner of our forum at
http://www.rarebananas.com/
Going Bananas is a good reliable seller, but does not do online orders
http://www.going-bananas.com/catalog.htm
I've also bought a lot from Stokes
http://www.stokestropicals.com/ or their eBay store.
It looks like you're next to Madison, WI. Are you growing indoors? If so, this is a good choice
https://www.logees.com/prodinfo.asp?number=R1973-4.