I have seen XQ10's wall mounted before using a custom bracket, (will have a dig to see if I can find the photo), and they looked spot on. All you do is mount them upside down so you don't see the screw threads - this isn't an issue as they only have the single uni-Q driver in them. This would be your best course of action. If you can't do that, suggest a pair of the new Q series either Q100 or Q300, both of which come with a wall mount bracket.
Do you mean a home made bracket, or was it one available commercially.