There's no shortage of leather crossdraw holsters to be found if you do some searching online.
I picked up a new/old stock leather crossdraw for my short J's a while back, mostly because it was made by a long-closed leather maker who made a lot of leather gear in the greater SF Bay Area when I was a young cop. Earl Ginn, whose shop was located in a warehouse part of Belmont. I stumbled across it when someone posted it on another forum, and got in touch with the online vendor who works to acquire such things for his website and his ebay sites. He said he'd picked up a supply of some remaining New/Old stock of this vintage pattern crossdraw, and I quickly ordered one.
It's based upon an old and well-used style, made popular a few decades ago. I primarily use it when the weather and my clothing make it appropriate, when I'm enjoying some hours in one of the big chairs at my cigar club. The design of the rear belt slot allows for some slight adjustment in the cant.
In practical terms, the type of retention and the potential greater exposure to a frontal grab (by an attacker) make crossdraw a bit more problematic for CCW, and some crossdraw holsters include more retention (like thumb snaps), or a more 'directional' draw. Just depends on you and your desires.
FWIW, I used to like crossdraw for my first short-barreled Blackhawk, back in the days when my dad and I enjoyed a lot of Jeeping trips into the backwoods. I often wish I hadn't allowed
that holster, handmade for some hardware shop many decades ago, slip through my hands, dammit.