Where to get 273 Head Gaskets?

I just found and bought a #260-1153 gasket set from hd_mad_dog (Mad Dog Racing and Fastengineparts) on e-Bay. It is supposed to be a Sealed Power gasket set for 273 and 318 only. I'll have to let you know which head gaskets I get. lol I needed a full set. I looked at my gaskets this afternoon and found Magnum and 85' 318 gaskets. I'll keep you posted when I get them the middle of the week. Mike