Here's some fabric I got recently that I thought would work for the border - it's Outback by Jinny Beyer. It doesn't have the full range of the spectrum, only purple, red and gold but I think it kind of goes. I don't know about anything else at this stage - I thought I'd keep it simple so as to not detract from the effect of the centre. I've got a couple of yards of this so enough to set it either way... but I'm veering back towards straight set again. :mrgreen: