I didn’t say it was a good idea…
Other options would be a 6300ABN3 the update to the old Smartech used on TAC-50. Than would require a separate box.
You could use a Smartech II, that’s a box with a PA door board and a different expansion board.
You could probably add that board to the PA board yourself like an HD-LM, the one with the little door box on top with the expansion board. That one is 6300AAR1 and includes the UIT. That would be a better setup I think but don’t know what it costs.
Or you could use something like an MCE SmartTRAQ. I’ve seen those used on an HD-98 operator.