I plan to make a F-15 Eagle but find the grey scheme quite boring.Now I'm looking for an drawing for a "charcoal lizard camouflage" scheme, if possibly with Tamiya color references. I found out that an older Hasegawa kit had such a scheme, but unfourtunaly, I can't find it on the internet. Maybe there's someone on the forum that can help me?

Hmm, perhaps you should try the "Aeroscale"-part of the kitmaker-network.
http://aeroscale.kitmaker.net/

Possibly you can get some good answers for your questions.

Perhaps this helps.
greetings...
Soeren