There's a very good picture of a Spanish 'falcata' at -
www.kah-bonn.de/pr/iberere.htm
In passing; AFAICS, the word 'falcata' is a modern coinage, not a genuine Latin word for the curved Spanish sword. It's derived from the adjective 'falcatus', meaning hooked or curved. The principal description of the 'falcata' comes from the Greek historian Polybius, writing about the weapons used by Spanish mercenaries fighting for Hannibal against Rome (IIRC, Polybius uses the Greek word 'machaira', referring to the earlier, almost identical weapon used in the 6th-4th centuries BC)
The 'falcata' wasn't the most common form of sword used by the Spanish; they preferred a short, straight-bladed, double-edged sword, which the Romans adopted and used for several hundred years.
It's been fifteen years since I last read Polybius, but IIRC he implies that the 'falcata' was a laminated blade (a soft iron core sandwiched between layers of carbon steel)
A year or so back, I had a local bladesmith make me a machaera; it's a pretty close copy of the one in the British Museum, except for some minor changes to the hilt and the point. He made it out of truck spring, and hardened/tempered it in hydraulic oil. It's a very fine blade indeed, with superb balance and cutting power (though not, IMHO, as good as a 25" Kobra...)
I can see no reason why the kamis shouldn't be able to make a perfectly good copy of this style of blade, given a wooden pattern; a sketch won't do (I sent Bill a copy of a picture of the British Museum machaira and asked him to get me one made just like it; the result was a superb quality, beautifully finished, 100%-traditionally-styled khukuri...)
