Tricky one. As uncommon as Paros are in fish shops in the UK, they are always labelled as either licorice gourami or P. deissneri, I think it would be hard to turn back the clock on this, unless you got suppliers to rename their stock lists. A commendable idea though!
As for comming up with a better name, I’m afraid I’m not very inventive… my girlfriend just calls them ‘secret fish’ because of the way they move, but not sure that would make a good trade name!