If it helps, I've bought from these guys a couple of times and...

If it helps, I've bought from these guys a couple of times and they've been excellent. Good prices and they send it to you via insured airmail within a day or two of receiving your payment. Payment was made via a bank transfer and they provide an invoice.

http://www.ainsliebullion.com.au/

As for storage, I'd say get a wall safe, or keep it somewhere obscure i.e. hidden under your house etc.. If you bury it in the backyard you could pretend to be a pirate.