^ They won't do it. I'm 99% sure that hydrocodone MUST be compounded with some amount of APAP (or similar drug), at least in the US. If not, it would be considered a schedule II drug (but I think that they just won't produce it that way at all).
The thing is, if you were to get that, the pharmacist isn't just going to put 15mg of hydrocodone into a capsule for you, its STILL going to be mixed in with some sort of fillers. Thats just how they do it.
Stick with oxy, you say? There's an easier example to view. Ever seen those oxy IR capsules? The ones that come in 5 or 10mg doses? 5mg is pretty much nothing; its maybe a grain or two of salt. Yet that pill is rather full of powder. Its just crap filler thrown in there to (a) make it easier to fill the pill and (b) hinder the ease of abuse.
Hope I've been of service.
Also, shooting pills is bad. (I'm required by law to say that.)