Here it is the Deagostini MP4/4 in 1/8 scale, This kit is made by Kyosho for Deagostini there are 70 different "issues" I got this from Uli at Autograph models in Germany. Modelspace may or may not bring these to the US next year, I couldn't take the risk or wait.
The only other 1/8 scale MP4/4 is at the Mclaren website and a prebuilt 1/8 scale Amalgam model, but thats $8000 USD, (for that much it needs to come with 3 real live pit girls) and it doesn't appear to have motor detail like this one