This is a Telus. A SIM card from them is $25, and I am not sure they are selling "naked" prepaid plans.
Since a factory unlock for an iPhone is made in Apple's database, supposed "difficulty" is pointless. It is not more difficult to unlock a British iPhone than it is to unlock a Canadian iPhone. Carriers, on the other hand, may display a strong lack of willingness (such as the one displayed when asked to block a stolen phone IMEI) and charge unreasonable prices. But this has nothing to do with purported difficulty.
Since a factory unlock for an iPhone is made in Apple's database, supposed "difficulty" is pointless. It is not more difficult to unlock a British iPhone than it is to unlock a Canadian iPhone. Carriers, on the other hand, may display a strong lack of willingness (such as the one displayed when asked to block a stolen phone IMEI) and charge unreasonable prices. But this has nothing to do with purported difficulty.