Dane,
I've done way more skiing than ice climbing this year, however, unless I'm not quite understanding you, my Petzl Sarkens fit on my Garmont Adrenalins without any modifications. Essentially, just adjusted the length and they could go between my adrenalins and batura's. Or did I miss your point?
As far as to contribute to the original question, La Sportiva Baturas + Petzl Dartwins = close but not quite fit. Regardless, my toe bail has been hammered enough to fit well and I've never had a performance issue noticable by my meager standards.