Formula flip flop + 32H silver
Alex DM18 rim.* Dont know of the prices in the UK, but here the hub is @ $50 and the rim is a steal at $18, and made from stronger, albeit heavier, stoff than an Open Pro. Build it yourself and learn a new skill. 3X is easy if you do it methodically.
Alternately, find a vintage freewheeld wheel, undish, move axle, and add a cog with plenty of locking compound. Dont "engine brake" until youve done one standing climb to torque it down.
And in the future,
lock your bike this way, using a cable loop to secure the front, and youll keep your wheels forever.
BTW, you can use pretty much any rear hub, cassette or not if you run across something. Spacers are your friend.
Sorry for not responding, as I totally missed this thread till it got bumped again.
*alternately get a Sun CR18 in silver polish for a couple clams more.