With my recent fixes, core-8-4-branch of Tcl/Tk Aqua builds once again on 10.1, I don’t have time to provide a binary distro of this however.
Someone has already gotten Tcl/TK patched for Darwin 1.4.1/OS X 10.1.x. I’ll see if this makes my fink struggle unnecessary.
<UPDATE> Here are step-by-step instructions.