Want to repair my factory air with some new parts. Please do not suggest replacing it with Vintage Air or similar, have other cars with that setup and not completely satisfied with them. Does anyone offer service on the original vacuum controls? I am missing some parts so will possibly need a source, mostly heat stuff as AC works now but not real strong, low air flow. As remember from the day these units did a good job. Have a manual so vacuum layout is in the manual. Any help will be appreciated.