Trouble is... I like the size of the older Seiko 5 watches. I don't know that San Martin, or any of the other usual suspects, AliX or otherwise, are doing much under 40mm or certainly not under 38mm. Best I could dig up was a 36mm DateJust and OP homages, from AgeGirl, which I'm told will actually arrive as R-brand fakes.
I do like those new 40mm 5s (and I'm pretty sure lug width is 20mm), but I think at the moment, I might be on the lookout to buy a few of the older SNKL / SNKL, etc. style watches.