Doing a trawl on Google for new wallets I found the Properta SD Wallet I will be ordering one when I get back to England.
It is a leather Wallet that holds the usual Cash and Cards but also has a section for a spare Sim Card and a couple of SD Cards. My Laptop fortunately has an SD card reader built in and I can get a reader for my base unit. With this wallet I can dump my pen size USB Data Sticks and move to the much more compact and convenient SDHC cards.
I haven’t moved across to them before due to fear of losing them. This solves that issue.