HP Store Online - Where can I get printer supplies?

Where can I get printer supplies?

Staples ,, look them up
If you want the genuine article buy a manufacturers cartridge from a reputable store. Alternatively if you are anything like the rest of us buy a cheap refill from Ebay - or a million other companies on the net. Google is your friend.
http://www.pyramidprintersupplies.co.uk/ I,ve used the above and they're really good. Another suggestion is to google "printer supplies" and you'll get loads of options.
Amazon, Play.com, eBay, Pretty much any store you can find that sells anything electronic
no harm in trying this outlet >>http://www.discandink.co.uk/
if it is for ink - i always use www.inksmart.co.uk very fast (delivery next day if ordered during weekday and their inks work very well :) all my friends use them too
If you looking in UK then I can suggest you go through the Stationery Direct