Sure! Here's what I sent to the one I ended up consulting with (you can obviously leave out the "your name was recommended" part--she's just not on Psychology Today).

"Your name was recommended to me as someone who works well with attachment issues. I'm looking for a therapist for a limited number of sessions (possibly just 1 or 2) to deal with a particular issue. Sort of a consultation thing. Are you currently accepting new adult clients? If so, are you open to doing short-term therapy? (with the possibility of longer-term)?"

When she replied saying she was open to that, I said this (probably more detail than she needed!): "Thanks so much for getting back to me. I thought I'd provide a little more info. I've been seeing a therapist for a year and a half (much of that twice a week). However, I often wonder if he's the right fit for me--we work well together on many issues, but when it comes to addressing the therapeutic relationship itself, there is often conflict, which leads to intense distress for me, as I'm rather attached to him (I've been attached to past therapists as well, in the form of anxious/preoccupied attachment). So I'm mainly seeking consultation on whether he's the right person for me to continue working with. Is that something you'd feel comfortable with? He's open to my seeking consultation, and I'd let him know that I was."