Most people are happy with their PAMs as-is so they're not looking to have them modded. Then the ones who do either buy the watches pre-modded from dealers/modders like from BK and Marlin or can do the mods themselves (like Grimlocktime).
I suggest contacting the modders and asking them one by one regarding their capability to repair or mod. Gen hands and dial are something you might have to source yourself before contacting the modder but again, it's something you'll have to ask.