I think I could kitbash one of them ...
On a more serious note, I'd probably want this on either a medium or assault chassis. Something with greater mobility, to keep up with command forces which are exploiting the 'Mech's greater tactical flexibility (eg. hot dropping, or crossing otherwise impassable terrain - when you care enough to want the very best).
Would actually make for a useful Cyclops modification, now that I think about it, and the 'Mech's 'back porch' provides plenty of space to mount the HPG dish ;)