I've gotten Fent patches and lollipops. I would usually chew on the patchs though some of them you can squese the jell out cook it up and shoot it.
I've never seen any kinda Fent that's in a powder form like a pill and have no idea how or where people are getting it.
Im sure junkies would buy just injectable Fent not mixed and sold as heroin.
Dilaudid is the same kinda short intense rush as Fent and junkies love Dilaudid some more than heroin