I have also lost the heater from my track ka. Im going to use a heater/blower that goes in the cigerette port. But hard wired.
I also considered fitting just the heater matrix rad behind the dash with out the fan, but its pointless really.
Also, as was said above, if your staying n/a go for the puma 1700, all alloy. and vvt and 125bhp. blacktop is 130 but heavier.
Or i might have a 1600 sportka engine forsale in a couple month, swr cam, swr manifold, brand new clutch, sportka gearbox. straight swap in a few hours.