At 14lb I suspect you're weighing more than just the frame, or your scale is broken.
Thee are some reproduction decal suppliers so you should be in good shape. Search on this forum.
I always admired the Mistral back in the day, for the attractive light blue colour scheme (at least the ones I saw), but balked at the price, at the LBS. Nowadays, I'd probably rather have a Tour de Canada, which I didn't even know existed, back then.