Being in Canada, I have to buy everything for my F from England, aside from oil filters and spark plugs. I find that Rimmer Bros has, overall, the best stock of parts, prices and shipping costs. Ordering from their website is just too easy. I can find some parts cheaper from others but buying all the parts in one place helps keep the shipping costs down.
WRT to the engine mount, KKB000421, it's 85,22 € @ Rimmers.