Doisur, Risgar recently sought my assistance in locating hunters to capture a blinded beholder and similar to fight in the Crone basement. I saw this as a chance to both increase attendance at the event, educate Sactuary on the best way to fight these beasts, and was willing to assist.
However, all the hunters of aberrations I approached were repulsed by the idea, connnected with the Ordered Mind, or even went so far as to offer the Crone's staff violence if such a fight went ahead.
I'd suggest that it would be more trouble than the effort is worth, and suggest an interesting alternative for you. There are several locations of rogue animatrons around the city. If you could capture one or two of the smaller variety, you could pit them against contenders or each other. With the current ill-feeling towards the things in Lower, I'm sure that seeing a couple destroyed would be most popular.
-Egon