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Did you try any of the RV parts sources over there? Are you in Australia or NZ? If you can attach a photo to your post of the tap as you call it I may be able to get you that over here (U.S.) as well as the vinyl, but I can also supply some sources over there if you give me your postal code.
Just checking back to see if you might have missed my earlier response to your question or did you get this resolved? If you still need some assistance please let me know and I can offer some direction on how to solve this