I just built the Do-335 Anteater trainer several months ago.. I'll see if I still have the instructions from it and give you the call out on the color it lists for the AS colors (I think those are their lacquer paintrs which aren't sold in the US).
You will probably have to order the colors from an online site like www.squadron.com or www.greatmodels.com for that plane. I know the HL near me doesn't stock them... MM is good and I have not had a lot of problems from them, they should work fine for what you are doing.
the topside colors for the Do335 should be RLM 81 - "Braunviolet" OR RLM 70 "Schwarzgrun" and RLM - 82 "Olivegrun" as the basecoat, the names in German are what you will see on the MM bottle so that is what you should order. The undersides are RLM 76 - Lichtblau which is also available from MM on either of those websites I mentioned.
there is a good site tracking down the camo pattern the Do335 actually used and the author has several opinions on it. He also thnks it is possible that RLM81 was used with paint RELABLED OR "MIXED WITH RLM 70" This is the site:
http://www.clubhyper.com/reference/do335camomu_1.htm
Personally I did my Do335 with the RLM 82 and the RLM 70 as I has specific guidelines I was following from the descriptions of an aircraft captured by the British at the end of the war...
Here is an incomplete pic of it:
Here is the original AC:
Here's the a few links with pics on the Do335 in both the trainer/nightfighter and single seater config I bookmarked while doing mine:
http://www.aeroflight.co.uk/profile/d335hist.htm
http://www.skylighters.org/dornier/index.html
http://www.aeroflight.co.uk/profile/d335top.htm
http://xplanes.free.fr/do335/do335-1.htm
http://www.albentley-drawings.com/dornier_do335.htm
Good luck!!!