Hoping y'all might have some suggestions for a strap for a Longines Legend Diver (22mm lugs). What I'm looking for is actually something close to the OEM strap, but I typically try to wear aftermarket straps to preserve the OEM straps. (Confessions of a watch flipper.)

I'm looking for something probably synthetic, that holds together with the spirit of the watch. But I'd like it to be formal enough to wear in a business casual environment. Definitely black, possibly with a contrast stitch, but it would have to be relatively subtle.

I've been looking at sailcloth straps, but the more affordable composite straps (i.e., Maratac) are a little too casual, especially being non-taper and squared off at the end. Any other ideas?