Same in Canada mate...the U.S. beats us every time in variety, value, products and quality...at low prices to bootlike a lot of stuff, the u.s. has a massive range of stuff we simply don't have in the u.k. or very difficult to find.
when we factor in shipping costs and possible customs fees its not worth it.
most of the hardware i will just have to make do with close enough metric.
the closest i could find for the hoses were motorcycle brake lines. as for size? who knows, they don't say.