Shipping between Canada and US is extremely expensive unfortunately. With the amount of stuff there is, I'd have to use multiple packages and I was trying a few shipping estimates to TX earlier today and it looks like just one box is going to be like $400-$600. I spent about $250 in shipping alone just getting the core, exchanger, and pump delivered to me from northern US.
Also I'm avoiding shipping large/heavy parts now, since last year I shipped some similar parts to Michigan and the whole package got destroyed and I lost quite a bit of money from that.