That made me laugh.. Canada, bit of a day trip!!
Anyway heater wise it is easy to work on....
To bypass disconnect the pipe from the bottom of the block by the oil pressure sender and then from the front of the engine and then splice a bit of new pipe in as a temp fix. I did.
Heater wise, its not the easiest to repair as I repaired mine and the rods broke off as soon as I put it back!!
To get it out you need to remove the centre console, Radio etc, so there is nothing in the way. Then you will see 4 captive nuts above. Now be VERY careful as the bolts only sit in a metal slot above and they have a tendency to break or you struggle to get them to go back! Now the heater is loose. Disconnect the electrics (its either one big plug and two light connectors or loads of individual connectors. Take a picture or draw it so you know where it all goes. Then just pop off the two air hoses and then bingo its out.
Fixing it now that's another story... I gave up and fitted a 6kw after market one.... I am ALWAYS warm now