The only four horses chariot I am aware of, is a greek chariot from Heinrichsen as painted by Doutchkine ( http://www.flattinfigures.com/vladimir-douchkine-2 (http://www.flattinfigures.com/vladimir-douchkine-2) ) for example, or Eric Talmant, or Mike on this forum. . I bought one painted from EBay two months ago painted, for possible repainting:
(http://i39.servimg.com/u/f39/17/41/09/92/new_p115.jpg) (http://i39.servimg.com/u/f39/17/41/09/92/new_p115.jpg)