I believe Berwyn Hobbies on Ogden Avenue stocks the BCR & BCR-2.
Neither of which is useful for RailSounds!
Bill, the YLB - RailSounds Battery Replacement can be used in any of them if you have the battery cable. RS-Lite boards used to also come with battery cables, but Lionel dropped the cables from recent Legacy production. If I knew the actual Lionel product numbers, I could tell you want sound boards they have. As far as other brands, they should mention battery provisions in their manuals. Stuff like K-Line and Weaver will always have the older RailSounds systems. I truthfully don't know what Atlas has in recent production, they make so few that I haven't seen any of them.