Thanks for your reply.
The reason why I do not like to scan final Polaroid shot is, that I exhibit and sell fine art images. Like lifted original, which cannot be reproduced the same way, price is guite high. If I print out digital print the price will hit the ground. It does not make sence to do that.
The Polaroid 20x24 or bigger are very, very expensive. I cannot afford it for now and I live in Japan as well. If I use film and enlarge photos on common color or B&W paper (like Kodak R14 maybe or similar one) with possibilities to lift it, it would keep sign of the original but expenses are small compare with Polaroid. One Czech photographer use some old German technical photo paper and lift sensitive layer as well. But German do not produce this paper any more.
Some another advice?