ISO Mac MC 2200 parts

Does anyone know a web site where Mac parts can be obtained? I have a McIntosh MC 2200 amp without original knobs. I'm looking to find original knobs to replace the current ones. Any help is appreciated. Thanks!!!
You might try Audio in Vestal New York who work on Macs. Mac themselves should have them but the price may be rather dear.
Ebay seems to be loaded with knobs for sale for Mac gear.
Second Audio Classics. First rate support there.