I've identified several bad modules in my pack. I'm looking for a source that someone may have already used on eBay or wherever for second-hand modules. TIA
Yes but very few do this because there's either a $1350 core charge fee or you need to return an OEM pack as core so a set of new modules costs more than the $1700 wholesale purchase price. New modules should not be grouped with used modules, the pack is held back by the weakest module.