http://common-lisp.net/project/mcclim/downloads/mcclim-0.9.6.tar.gz. Alternatively, you can install McCLIM via asdf-install.
ive just tried asdf-installing McClim on a fresh sbcl setup, and it gives a download error for cl-jpeg (package cl-jpeg, required by mcclim-jpeg-bitmaps). looks like there isn't the relevant page for cl-jpeg on cliki, nor an asdf-installable package at common-lisp.net