I have a maroon clown and two anenomes. A sebae and a long tentacle, it loves both of them, it just stays in one for a while and then moves onto the other one. I used to have a bubble tip anenome and it never went near it, so who knows? I would guess that getting one of the ones suggested to work with your perc would help but that it is not perfect. If you look at the info for hobbiests(sp) part of saltwaterfish.com I think they have a section that talks about the best anenomes to put with clowns, so you might try there also.
Good Luck!