Don't hold your breath.
A quick look at the Masterplan, (Google), says lots about retail and carparks, nothing about navaids.
Problem 1 is who antes up for it, but before that you have problem number 2 which is the sheer cost of the HIALS that make an ILS worthwhile, which is why Wagga and Tamworth have LIRL and MIRL only.
Problem number 3 is you are up for a whole new D.A for an ILS with all the joy that that will bring.
Problem number 4 is getting Airservices to organise the whole shooting match because whoever pays for it, they are the only guys who can tinker with one in this country.
Oh for the good old days when the Department of AVIATION would see an operational need, do the math, do the damn work, and fund it from the fuel tax that was used to support aviation infrastructure this country. Sigh................. 32 years......so much anger.............