Rick Bachman -
www.oldwestreproductions.com - does F.A. Meanea proud with his work, but then, he 'knows' those holsters well, because he lives where they were in use.
And you can try Chuck Burrows at Wild Rose Trading Co - wrtc@wrtcleather.com - he can do a beautiful Cheyenne-style Meanea holster, too.
Since Rattenbury's 'Packing Iron' was printed, that particular style has probably been the most copied of them all, so pretty much any of the holster makers whose work you like will make one for you.
El Paso Saddlery never made them originally - they were a 'Northern Plains' style, after all - so any patterns they now have are new.
I had a plain one some time ago - it was nice enough, though heavier than their earlier efforts, but someone liked it more, and bought it, and an El Paso Saddlery 'Hardin' shoulder holster from me.
Scouts Out!