No, I don't, and I'm one of the folks who's mucked around in acs-templating and I wrote ad_form.
Backporting ad_form to the old version of acs-templating shouldn't be too difficult. There are only a few minor hooks into acs-templating changes. You would probably want to pick up our version of the date datatype because it wasn't complete in 4.2 (which means you probably don't use it so maybe there'd be no need to update.)
If you post some of the dependencies and problems you ran into while trying ad_form with the old version of acs-templating (if you decide to try this approach again) folks will try to help you ...
