Yes, they are discontinued, but, here are seven places that are selling them off. Note that some of them have sold down to less colors than they had when I started buying the paints, after so many people declared them "all gone." (I bought over 500 bottles since those posts started up)
Internet Hobbies www.internethobbies.com/inhobpain.html
Internet Model Trains www.internettrains.com/.../merchant.mvc
Megahobby www.megahobby.com/1ozbottlepollyscalerailroadacryliccolors-2.aspx
Sprue Brothers store.spruebrothers.com/.../1822.htm
Hobbymasters www.hobbymasters.com/polly-scale-military-acrylics-paint-1-2-oz.aspx
Tower Hobbies Floquil Enamel www3.towerhobbies.com/.../wti0091p
Tower Hobbies PollyScale www3.towerhobbies.com/.../wti0091p
This link I just got the other day, and have not ordered from them yet Train Liquidators www.trainliquidators.com/.../index.php
in addition, you will find vendors on Amazon and Ebay, using Floquil , Floquil Polly Scale and the misspellings of Polly Scale , and Aeromaster (on Ebay, both types, Acrylic and Enamel)
I hope you can find the colors you need this way,,,,,,,,,if not, I do have three local places to get some of the colors, as long as the one closest doesn't send them back to the parent store, 3 hours away.
Rex