French threaded c-record sheriff stars!

So I just picked up a set for a Relatively sweet price on the (e)bay just now, not realizing they were being described as French threaded. I’ve had trouble finding a great range in French threaded cogs available ( a few old 19tooth maillard ones on eBay).
Am I biting off more than I can chew by buying this wheelset and tryig to find cogs for it?

Also what lockring can I put on this wheelset, is there only one sized thread or do I need to find some “French” threaded one.

Happy to listen to any alternative ideas.