I cannot understand why in this day and age, why publishers don't set something up where their publication is produced in different territories - have your main printer in the States, and one to produce the required demand in Canada, one in Europe for UK etc. This would help prevent the publication being ignored in those areas due to the cost of shipping making a publication to pricey to be worth buying, it would also mean the publication can be available on the same date in the different areas across the world. Fairly simple editing in the magazine layout stage could 'localise' details in the publication - for example changing US $ prices to UK £.