I have one that may be of interest to you. I built one (via pallet, no heat shrink) up that was supposed to be 4 1/2 but came out to be 4 5/8. The condition on it is a 9/10 as this is my backup frame that I only use unless I really need to. The offer price is 100 USD; I'll be willing to ship to the UK as well. Reply back to jasonsjsu9 at aol dot com if interested. I have references on these boards under jayserinos99.