Pollyscale, Floquil, Pactra, and ModelMaster hobby paints along with Rustoleum and Painters Touch industrial & household paints are part of the same RPM Industrial Products company.
Pollyscale paints are still in production by Testors. Is it that you are having problems finding them at your local hobby emporium? How about ordering them direct from Testors?
http://www.testors.com/brand_category.asp?brandNbr=2
Pollyscale is still among the most favored paint line in the model railroad side of the hobby.
Maybe its a case of with all of the other acrylic paints on the market your vendor has chosen to narrow his offerings.