Did the local shops have any .358 Norma brass?
Reliable and Italian in Vancouver had factory ammo last time I was there, as did NTF in Prince George, Corlanes in Dawson and Backcountry in FSJ. Just like many cartridges, brass needs to be ordered. Even at Wholesale Sports they usually only have a limited brass selection- Like about 20 or 30 cartridges out of the hundreds available. So sometimes you need to make your own brass- that's what I did for my first 40 cases.
Dies are easy to get, there are no export issues with dies and they can be ordered direct from the USA in many cases. Any local store that can't get you dies doesn't care about your business.