Unless you are looking for one of their drop-in/replacement barrels, they are really nothing special. You can obtain Heym Barrels (equivalent in quality and manufacturing) from Bits of Pieces in Vancouver.
If you want a decent button rifled barrel, Ted Gaillard in Canada makes as good a barrel as you will find using the button process.
There is nothing stopping you from ordering direct from the BergaraEuropean outlet; all you need is an international import certificate, and these are free... apply on-line.