as for bounty chips, I would use whatever I have lying around. my tourneys use 25's as the smallest chip, but I have 1's and 5's in my chip set, so when I run a bounty game I use those chips not in play as my bounty chips.
failing that you can use the tabs from soda cans, beer bottle caps, or anything else that your players wont just have in their pockets when the game starts.
worst case scenario,
www.pokerchipswholesale.com its an American site that sells all kinds of chips, check the bulk chips section they usually run about $0.10 a chip, shipping might kill you though...