SEMA had a few HRVs running turbo setups. Adding a turbo to any engine isn't the hard part. It really is just selecting a specific turbo, the piping, and the cooling. The hard part is the tuning of the engine. You either have to go with a stand alone EMS or some sort of piggyback system.
I suspect in the next few years, you will see more companies come out with an off-the-shelf turbo kit for the HRV.