You might want to check these sites out and see if they have what you are looking for. You can also find Tomica Cars on EBay as well.
Gasoline Alley Antiques
TOMY TOMICA DANDY Diecast cars and trucks for sale from Gasoline Alley Antique
ToyEast.com
ToyEast.com - Model and RC Marketplace of Tomica, TAMIYA
70s と 80s年代 の 日本映画, CM, J-POP, TVドラマ と アクション刑事ドラマ 大好き!