Ung, yeah, I have one. I'm in the same boat as you. I like OWB and I prefer leather.
I had a semi-custom Black Hills Leather unit on order but after it arrived 6 weeks later it wasn't what I hoped for. I also tried a Black Dog kydex OWB and disliked it, to. Also tried a DeSantis mini scabbard which would have been okay if it was 0 cant and had a little wider tunnel belt loop, but it didn't, so I dumped it.
Basically, I want a simple "Askins" style tunnel belt loop holster, 0 cant, no fluff on it. The discontinued Don Hume JIT looks to be about what I want but they don't make it for the 43 nor for any guns substantially similar. The next best option I think is the Mitch Rosen Express line Upper Limit, or maybe some offerings from Fist. I also will look at the Desantis Speed scabbard though I don't like the belt slots, but I'll evaluate it. I emailed several custom holster makers as well as Desantis and all offer holsters for the 43 but no one really has an OWB like what I want, probably because the 43 is most commonly carried IWB or ankle.
I do have a DeSantis ankle rig for it and I like the holster part of it, if they made that in a belt mounted version minus the thumb break it'd be about perfect. It's trim to the gun and secure and very compact.
I shall keep searching...
The Safariland holster is just too big for the 43 IMO.