A roll of flashing is around 70 bucks.. seems expensive until you figure you can get like 27 covers out of the roll, then they cost about two and a half bucks each.. BUT, you NEED that many of them to make it worthwhile, AND you have to bend them etc... Being the lazy fellow I am (when my wife is not looking) I just quit using them and painted the tele covers well. Figuring to replace them when they start to go bad is as cheap as the cover.. BUT, if I had a good supplier I would consider it. The only issue I see would be shipping.. Shipping about anything really stinks! I can sell a complete hive for about the same price I can ship it for...
So a lot will depend on your ability to get the material at a good price so it can be shipped at a still good price.. Dont think your that far away. I might be able to drive there and back for the price of shipping 50 of them.. Let us know what you figure out!