This one posed a pretty unique challenge, so I gave it a try. Since the OP has aspirations of selling his own version, I will not post a higher resolution image nor will I post this for sale without his permission. I enjoyed the project quite a bit!
Full resolution sample of the image's upper left corner:
Boerderij, if you want any of the layers (I have the paper, text, signature, and seal on separate layers), I can post them at higher resolution.