If you do a search, you should be able to come up with some Accel racing spark plugs that are an exact match for the AC C 44s. As far as finding new C44's, your pretty much out of luck except if you find them on Ebay. I think the Accels are $2.89 or something to that effect but if you want something cheap that still works good go get some Autolites. That's what I have in the '54 right now and they work fine. I did clean up my AC's just to keep around for spares, thinking about putting them back in.
