Yeah, I got nothing in a search and frankly, can't recall even knowing they existed other than maybe seeing them in a catalog.

Re orientation, the higher the height to width ratio or vice versa sets its primary polar response, so for up close monitoring, horizontally wide to control/minimize its horizontal response and minimize c-t-c spacing of multi-ways and vice versa for further away.

How 'further' depends a lot on [acoustic] XO point/slope Vs distance to the 'sweet spot' Vs how well time/phase aligned they are.

GM