Are these the stud things you're thinking of? They're called studs or nailheads.
Kit Kraft inc., Studs & Nailheads
I just got some for Christmas along with a bedazzler, so I haven't tried them yet. I know you can put them in by hand though, especially the bigger ones.
I'd also recommend these 2 ebay sellers for pendants, coins, shells, etc.
eBay Store - THE GODDESS GARDEN by K-Lee: Bellydance, Belly Dance, Tribal
eBay Store - sirik: TRIBAL Coins, TRIBAL Dangles, TRIBAL Headsets