In Singapore, with out expensive standard of living, I find it hard to believe that you can get a good deal for electronics. What we do have are the Creative warehouse sales which have taken place about 3 times this year already. It's a local event with prices slashed to half and below of retail's. Factor in the exchange rate and you can get a surprisingly good deal. It's just too bad that they don't do their warehouse sales online.
I'd rule out Singapore for now, personally. I haven't seen many fantastic bargains unless you go down to our computer supermall and buy in bulk from them.
Go to the Malaysian Embassy in your local area and check out with them on the trade section...I am sure you can find lots of companies willing to export the products mentioned and from the leads, follow up with official enquiries and write to them for quotations, brochures, etc,etc.
Just my experience where I used to visit the embassies of other countries in Malaysia and you can get first hand advise and tips from them on any products that you require or wish to import.