Does anyone know where one can purchase AMG engine and exhaust mods for the older motors, namely 5.54 litre motor that was in the sl, sec and sel in years through 86-90?

AMG had one car which was called the AMG Hammer, the show car was red. It had a 560 motor in it, I think punched out to 6.0L crammed into the 87 300E.

Since MB purchased AMG I havent been able to find any parts at all.