Makes a refreshing change when a new poster has clearly put in some effort to answer their own question (and knows their way around the search function).
Hopefully someone with direct experience will be able to point you in the right direction otherwise I'd just say to fire off a few emails and see who sounds the best/most keen.
In my review of xmanchesterfun I did mention that she'd probably be good for those looking for subs. This was based on previous reviews but mainly my own experience that she was accommodating and essentially good at her job (as well as the fact that she'd try to facefuck herself if you weren't gonna do it) even though I myself am very vanilla (and will be staying that way). The even more recent review by Batman seems to support my conclusion. Send her an email or frankly call her up (since she's only here for a very short while) and see what she says - you won't be the first the person in this position and I doubt she'd think you're a weirdo. Do report back if she's a bitch to you though.