^ No. When you get your concession discount at the pharmacy, it's Medicare who is covering that extra bit of the cost for you. So if you aren't getting a medicine under the PBS for whatever reason, you won't get it cheaper.
Some pharmacies might be nice though and if you show them your cards and tell them that it's very expensive for you they could help you out and bring down the cost somewhat, but definitely nowhere near even the General PBS price (unless it's a cheap medicine anyway, read: patent expired).