I use an LDSystems "Mei One R" wireless I.E.M. solution on my Studio 192 with Shure I.E.M buds. You can add a number of receivers on it, its rack mount it. Same principle. Channels 1+2 go to the I.E.M while main outs go to my monitors. Wasnt cheap but wasn't expensive either. Works around 825Mhz uhf and supports many belt packs.
I hope that helps some.