Dick, the market is just too small when you look at IFR helicopters. Garmin refuse to certify the 500H for IFR and the 600 doesn't have a helicopter equivalent. The G1000H is restricted as to where you can get it as Garmin prefer to sell it to OEM's only.
The other option that I looked at for you was IFR certified, but their units would cost approx US$150k, PLUS installation. That is a lot of coin.
So the Chelton/Genesys option was the cheapest IFR option that is available as an RK replacement, unless you can find the Astronautics screens somewhere. The Astronautics screens are in the later 109E and all the 109S as a response to the issues with RK.
They are a plug and play replacement but you must replace all four at the same time, so plenty of dollars there too.
Would be interested to hear (PM if you like, or email) why the Genesys system isn't moving forward.
There just aren't that many avionic OEM's out there willing to throw money at a small market like IFR light twin helicopters! I don't know what the long term sustainable solution is, except to go back to steam gauges with an IFR moving map display?