Denon Professional
Marantz Professional had a similar unit as recently as a year or two ago, but it appears to have been discontinued. Probably happened when Denon bought them out ( a sad day for MP).
Sony, Pioneer, JVC also have professional arms, so you might be able to dig up a few others as well.
Regardless, I don’t think you’re going to find that these products are the bargains that the Behringer amps are. As noted, outside of theaters, there just isn't much demand for multichannel surround sound in professional audio settings.
Regards,
Wayne A. Pflughaupt