SLV can be bought on Squaregain - I also use goldmoney. Bought all physical last year from a coin dealer locally. Tried to buy physical from the US but most dealers wouldn't sell. Canada probably the best bet - I was quoted by a Canadian firm not including VAT. Unfortunately my laptop blew up recently so I haven't got the email but they should be easy to find. They would ship in 100 oz parcels - up to you to declare and pay VAT
You could also invest in silver stocks to gain exposure - I have SSRI, Minco, Ovoca (silver mine in Russia), just bought Arian for wifes pension. Check out www.silverstrategies.com for info on all the silver miners / explorers. I also hold gold - physical and GBS, Goldcorp, Mercator and ML Gold and General.