I live in Australia. The products I listed are readily available from the local electronics shop. For more specialised items RS Components are a good supplier.
Direct link to RS Components UK contact cleaners.
http://uk.rs-online.com/web/c/?sra=oss&searchTerm=contact+cleaner&x=27&y=13The bigger issue that requires addressing is good housekeeping practices.
The plating on battery contacts, batteries and memory cards are designed for trouble free service for the life of the product.
Too many people purchase portable electronic equipment products and permit contaminants in their environment damage their equipment. Hence the battery contacts, batteries and memory cards become contaminated with foreign matter due to inadequate storage conditions.
I keep all my spare batteries and memory cards in small sealed plastic containers packed in foam. I use a two shelf concertina metal tool box to store all my chargers, spare batteries and memory. The bottom of the toolbox carries an assortment of cables.
I also keep a cheap multimeter on the top shelf of the toolbox for field diagnostics.
When I use my camera, I also carry the toolbox in the boot of my car.
The bare essentials; two spare fully charged battery sets and two memory cards in individual sealed containers will fit neatly inside a small plastic lunch box container.
My primary camera, a Canon S3IS is still in pristine manufacturers condition, because it is packed in foam in a carry bag I purchased from a ladies handbag shop.
