Active job

replacing spa bath jet nozzles and drain

We are about to get our spabath completely repainted professionally and also want to replace the jet nozzles, drain cover and possible the on/off switch. We have been able to unscrew most of the nozzles but we can't find anywhere so far that we can purchase new ones off. One of the places suggested a plumber might know. Anyone able to source these at all? Not sure of the model/brand of spa but have the pieces out so could match them pretty easily. Thanks