I picked up my speaker stand today which I'll be modifying as a shooting stand. For anyone else considering this there are plenty of choices on the bay for around £15-£20 with postage included which look suitable.
I picked mine up at a local music shop, I've had it out of the box and I'm really chuffed with it. It's beautifully stable and a doddle to adjust the height.
I'll update with pics once I've got my support mounted.
Andy