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It is a rare model, since the CF scales were not a regular production run.
You could see if Benchmade can reblade the knife, since they may have some blades around. That, and get rid of those jerry-rigged fasteners. There are probably other minor issues, since the previous owner apparently wasn't too mechanically savvy.
If it was me, I'd simply clean it up, hand polish the blade to keep the grind lines as sharp as posible, put the correct fasteners in it, and use it.