WTB AquaticLife Smart Buddie, three chamber DI addition, dead rock

[NeverlosT]

Just what it says, I am looking for deals on extra rock you may have lying around, and looking for an AquaticLife Smart Buddie to add to my RO system, and want to check to see if anyone has one of those 3 chamber DI units that BRS sells before I get one new (I want to run Cation, Anion, and mixed bed separately).

Thanks for looking!