In reply to anomm:
There is a video on YouTube of someone who has built there own.
That said you need a mate with a plasma cutter and a rivet gun to make his solution! Not the easiest thing to knock up in a shed.
Additionally in an ideal world I'd want the support to fit into the pot for storage so I'm wondering if there is a market for a slightly more elegant solution.
Maybe a Kickstarter campaign is in order?
