I think the best chance is to find an email address of her agency, contact that address and ask for this "service".

I myself have collected autographs of actors and some sports personalities that way and managed to get signed pictures of (e.g. Audrey Tautou, Raquel Welch and some others plus some figure skaters (one of my sports peculiarities...) and other winter sports professionals). For some of them I sent a photograph with international reply coupons (= vouchers they can use to send return mail without them having to pay any postage fees), some didn't require this at all but sent the photo as reply to email alone.

BUT, I think it would be wonderful if Totem would collect autographs from every performer that they work with, and either sell them or put them out as awards in some competitions. For example, have every performer sign e.g. 10 photographs of them (taken during their visit) and you could win these in some competition, or when you buy any of their wardrobe from eBay auction, or as prizes on some sweepstakes etc... I believe the women would gladly sign some pictures and such item would surely be a very nice addition to everyone's iStripper collection.