Pretty sure the difference will be only a plug connection and easily solved with solder or aftermarket connectors. Discount to $100 for your trouble. @barbagris will know I think.
The accessory fog lights were similar I believe and had the same VIN cutoffs.
Never seen a heated grip kit first hand. AFAK those plugs have been constant though. And as stated - it wont cost 100 to replace it.
The foglight kits are a bit odd. One kit (I cant remember which) comes with a little aluminium bracket to go under the L/H side panel to mount the relays on. My 2009 came with a steel bracket already there.