Hello,
i put one of these in my westie from the US
https://www.valterra.com/product/rocket-hand-pump-chrome-carded/
Has a vintage look and worked brilliant you will have to drill new holes tho
Regards
AFAIK there aren’t any similar replacements. I bought one of the taps in your second pic a few years ago, but as you say recently they seem to be out of stock.
The one suggested above looks pretty good though.
• Self-priming and provides constant water flow • Requires 1-3/4” access hole • Plumbing hook-up is not provided but uses a threaded 1/4” MPT fitting • Instructions included
jrproducts.net
You need a 1/4" NPT barb but I used a BST one with some PFTE tape no problem.