Seiko have made resin cased versions of their Seiko 5 dive watch.
Ladies and Gentlemen I give you the SRPG series: https://5seeker.com/?s=&tax_1=case-m...tax_5=&feat_5=
This is the blue version (SRPG75K) but there are other colour versions - more subdued than the Moonswatch colours though.
It has a case width of 39 mm, a thickness of 12.4 mm, a lug-to-lug distance of 45.4 mm and a lug width of just 18 mm. So a bit smaller than their usual fare.
It has the Seiko caliber 4R36 automatic movement featuring date and day complications, and a water resistance of 10 bar (100 meters).
Now for the catch - they're only available in far east markets, which includes Australia. Unlike the Moonswatch they seem to have resorted to discounting to shift them!
Reduced from A$399 to A$249: https://starbuy.com.au/seiko-5-sport...watch-srpg75k/