I'm sure I've read in several places that you can, but what conversion kit you need ( dependant on it being Pro2, Pro2 Evo, or Pro4 ) is still a mystery to me.
plenty of people want to sell you something at least equivalent for less dorrah - this isn’t a case of Surly making something unique - they are late to the party and look expensive.
Just move to the US, $625 for the frameset. Might pick one up on the way home (assuming I can convert my Hope Trials hub to 12mm)...