If your 177 is from the hublot factory your screwed as once the hands come off they dont go back on as the hole in the hand is to large, probably the reason it fell off.
Sead has made a thread about this problem somewhere.
I'm also in the uk so will keep an eye out on the bay etc, i can see why your [censored] about the strap it looks great and i agree a non wis will probably bin it