I started a thread about the perfect sandals no longer being made and someone linked to those Mamaowl ones as an alternative, they are lovely. Is it the price stopping you from buying them?
All the usual shops stock Fisherman's sandals, the next best imo are the Clarks' version. I bought some from Celtic and Co but the leather was so soft it tore doing the buckle up.
In the end I bought a pair of my original sandals from Vinted, but I am still tempted by the Mamaowl pair.