Well, I managed it. Hopped over to the Canimal sim and then got myself some altitude and repeatedly bounced off the Dazzle sim border for ages!! (ok then, 2 minutes). It worked. I got in, had a wander around Last Call and wound up spending L$2300 on new clobber, including one gorgeous gown which was admittedly L$600, but the rest was all L$100 a pop, so I got some bargains. I am now officially 'frocked up' and won't need to buy a new gown for a long time.
I just need to get invited to glittery occasions now :D