I don't see why you would have to mention Tamiya but if your heart is set on it so it comes up when someone does a search on Tamiya, here is how I see it done with soooooo many car adds on ebay.
For example the will say;
For sale, 1967 camaro, not 68, 69, or 70. Not a Mustang or a corvette.
THat way they hit all the search words and don't get pulled. Coincidentally, I hate it when people do that.[>:]