Fucking impossible to find in London it seems. 'Distributor' issues or something...
Anyway, the silver lining is that I remembered IanJ got his from Norman Records so I popped over to the site and there it was, in stock.
And then I remembered to see if they had the Friends of the Bride 7"...and they did. So I bought that.
So in fact this is the best purchasing ever. It's just a shame they didn't have the TTY single but there you go.