Yes I see Mipro have a front mount antenna panel, although it looks like it supports TNC only. I can't ascertain if the digital Mipro system utililises this kind of antenna, but I'm hopeful (EDIT - just checked specs and the antenna out is TNC so all good)
My idea currently is:
4U Rack Case
4 x Mipro MI-58RT
1 x Front Antenna Mount Panel.
1 x XLR Patch Bay at front for cleanliness of cabling (to link desk AUX outs to transmitter inputs)