gerber training pants are thinner. you can find them at walmart, target, BRU, etc. about $8 for 3?
hanna anderson has fabulous trainers, but they are pricey. thicker, sized larger (may last longer), and the material is really high quality. you can get them at valley fair. there are a wonderful $24 for 3? they are currently "on sale", but still expensive.
tiny tots in campbell has a few other options for cloth training pants. Imse Vimse has thick trainers with cotton terry, i think they carry "little day dreamers" and a few other options. you can google them to find the website, location, info, etc.
i agree. pull ups are not useful for potty training. if you know you'll be tempted to use them all the time, i would avoid buying any. we have one pack around that lasts forever because we only use it when our son is checked into sunday school. it's just easier for the volunteers to deal with.