Firstly the Government plays no part in making our electronics and other gadgets available here, if anything the import duties just make them more expensive. Most electronics are available here, some with just a European version, such as my Clie 770, which is exactly the same as your 760. However PDA's are the one area where I find it impossible to find any accesories. Most electronics stores carry the units themselves, and only supply the accessories made by the PDA manufacturer. Most of the best accessories though are made by other companies, usually based in the USA or eastern countries, and there probably isn't a large enough market for them here to warrant a large scale importer.
I find that here we pay inflated prices for pretty much everything, just check out the UK Sony website and compare. I've bought many things from the US and had them shipped over, from DVD's to Zippo's, and even with shipping costs it works out a lot cheaper, I just have to wait a few days for it.