I have bought from these guys several times. They make canopies and supplies. You can buy just the fittings and build a greenhouse frame for any configuration you choose. Their fittings use steel EMT conduit which is inexpensive and available at any Home Depot or Lowe's.
Check them out here: (link removed) The company name is: all4canopy you can Google the web address.
Check them out here: (link removed) The company name is: all4canopy you can Google the web address.
