You can have this sink for free if you want it - it is from my old folding caravan and was going to put it in my bus but bought a smev unit instead. Just needs an electric pump to attach to the tap (or a foot operated one)
I've got used smev seperate hob and sink, like these https://www.ebay.co.uk/itm/Camperva...875688?hash=item3b333053e8:g:U5kAAOSwpwZdARcP I have a pump and tap and I think I have gas regulator too. PM me if you are interested.