No, as much as I understand it won't fit, because the 68k is soldered onto the mainboard.
You need to plug the 68k out, put the Clockport adaptor in, and then plug your accelerator or the 68k on top of it.
Btw, don't worry if they don't reply, because they won't.
I will call them this week again.
Have fun,
McTrinsic
P.S.: Redrum, did you get any answer, though?