Hello Piper
A number of years ago I had the clutch and flywheel replaces with the dual mass flywheel, it was not cheap and regardless I understand they are no longer available. The only places I have seen complete conversion kits are from the American suppliers. Try Ecklers, Corvette Central, Mid America or maybe even Rock Auto. You might also check in at some of the specialist corvette shops in Ontario.
In the past there were problems with excessive gear rattle and vibration when going to single mass, but the conversion kits, at least read like, this has been resolved.
Good luck.