70 dart pushrod seal

[snowmobiler7c]

Anyone have a source for the pushrod seal or o ring? Im installing Kelsey hayes brakes on my 70 swinger. I just changed my master cylinder to a power master cylinder made by ray bestos MC36406 the one everyone seems to be happy with. I removed my old pushrod but the new master cylinder didn't come with a seal. I really don't want to use the old one. Local parts stores don't seem to stock them and cant order them. thanks
Mark

 

[Garrett Ellison]

Dr. diff has them.

 

[snowmobiler7c]

Dr. diff has them.

Thanks just ordered one. The guys at the parts stores around here look at like I'm making something up. Now the wait to get it and move on. thanks again