I have a restored 6V AM radio that I run in my 1948 Chevy 1/2 ton truck. Are front wheel static collectors (GM part 494786) still needed to maximize reception? I do NOT have them on my truck. I read somewhere that today's modern tires contain graphite, cancelling out the need for the static collectors. A few condensers are installed in various locations around the truck. If advised that using the static collector is still a good idea, where would a guy source a pair of them?