Can't help you there, Mike as I've never seen one for sale. Possibly, a junkyard will supply a similar wrench that can be sawed to length, heated & bent, then painted to look like a Pantera wrench. But I caution you and others NOT to use the short jack-extension as a lug wrench with a ratchet. It's unfortunate that the hex size for the jack extension is coincidentally the same size as the lug nut hex. Because the jack extension is unhardened and will split the hex if used there!
A split jack extension can be rewelded, dressed smooth and re-alodined gold, and can then be safely used again for its designed purpose or for shows, but it cannot ever be used to tighten or remove lug nuts! I've fixed one for another owner plus one of my own.... Same goes for the much longer telescoping extension for the Mangusta, I believe.