Where can I buy a Red 1973 Mustang 351 diecast/model car?

I have been looking all over the place to buy a model car for my dad's birthday. He owns a red 1973 mustang 351 and has always wanted a model car of it. It is very rare because they were only made for a short period of time. I have not been able to find any of them anywhere. All that I can seem to find is the 1973 mach 1 which is not the same car. If anyone could help me as to where I could find and buy a model car like that I would greatly appreciate it.