I believe Duro and Jerold is what people are referring to as the repop cheater slicks. I believe they are using the term "cheater slick" as a generic slick tire term though, so they are not talking about the tire that Huffy used that had Cheater Slick on the side wall.
There were many blackwall slick tires made in the 70's (and probably 80's) that were "replacement" tires for muscle bikes. Bike Pals comes to mind as a decent replacement slick tire from that era. Nice and wide, and has a dual raised line on the side wall that can be painted with red. There are lots of these types of tires on eBay, vintage blackwall replacement tires like the Bike Pals, Vinlyon, etc.
Here is an example of this type of tire, from someone I know is a good seller:
http://www.ebay.com/itm/NOS-20-x-2-...CLE-BIKE-S2-/301738281544?hash=item464100ca48
Hope that helps!