I actually planned on doing it a while back Scott. I even went as far as to buy a domain name and get a site halfway built. Problem was though that backgrounds take anywhere from 12-15hrs or more to build a nice one so it would have interfered with my custom fly rod business too much. Plus with the amount of labor and cost of pond armor the profit margin just isn't really there to make it worth the time. So I pretty much just limit it too helping the club raise money at auctions, and for a friend or two here and there.
With that said, with winter right around the corner I am actually planning on building one or two to sell just for the heck of it soon so you might see one show up here in the near future if I get the extra time.