I'd imagine its probably more about a US dealer shipping to a Canadian and violating their territory agreement.
Some non-US citizen probably figured they'd save a buck by ordering from the US, and St Paul figured they'd help the guy out. Then the customer likely couldn't keep his mouth shut to the local dealer.
If you go to Ronnies HD site, they explicitly call out that they can not, and will not ship any OE Harley part outside of the US or intends to do so. And they don't do Buell.
https://partsfinder.onlinemicrofiche....asp?make=hdmc