WHO MAKES: Mk VIII Liberty/International in 15mm?

[Featherstone]

Seeking a classy 15mm Mk VIII Liberty in good condition for a loosely-historical interwar 1920s romp with a section of US Marines. Anybody know of a company that makes a 15mm Mk VIII? Or something that can be reasonably converted? (Even the Indiana Jones tank... or a larger scale...)

Having quite a difficult time finding anything besides a 1/72 scale Shapeways reasonably priced at exactly one arm-and-leg. But if I get desperate...