I have a Rare Factory new unfired complete Steyr 9mm AUG Kit to change from 5.56 to 9mm. Very few ,only a couple hundred, were imported into the US and no more since the ban. This is the newest 6th generation kit. Get the conversion kit while you can !
In regards to making this a complete stand alone 9mm AUG. All that is needed is trigger pack , receiver , butt pad and takedown/sling pin. All can be purchased online and available. The receiver will be most likely be marked .223/.556.
Willing to trade, looking for FNH FS2000, Hk or HK type rifles, M1 Garand, IWI X95, Ruger Precision Gen2 6.5 creedmoor or anything else interesting . Willing to add funds for the right trade