You should check out the Bohlender Graebener in wall options (there are many) at Parts Express. You could also visit the BG Corp website.
http://www.partsexpress.com/webpage.cfm?WebPage_ID=135
I've not tried any of their in-walls, but use a pair of their floor standers in an HT system and they are quite nice ribbon/planer speaker. Whether any of their designs could be on-wall mounted (as opposed to in-wall) I'm not sure, but the forum group linked on the Parts Express website might be of some help. I'm not aware of any ML or other electrostat manufacturer that offers on-wall or in-wall options.
Wait, having said that, don't the Scripts wall mount? It seems that I've seen ML speakers wall mounted in the Sound Advice showrooms in South Florida.
http://www.partsexpress.com/webpage.cfm?WebPage_ID=135
I've not tried any of their in-walls, but use a pair of their floor standers in an HT system and they are quite nice ribbon/planer speaker. Whether any of their designs could be on-wall mounted (as opposed to in-wall) I'm not sure, but the forum group linked on the Parts Express website might be of some help. I'm not aware of any ML or other electrostat manufacturer that offers on-wall or in-wall options.
Wait, having said that, don't the Scripts wall mount? It seems that I've seen ML speakers wall mounted in the Sound Advice showrooms in South Florida.