Just to say thank you to AVR. I've only just noticed it, but the NIVA appeared in our downloads section the same day I asked.
There's two colours (Blue and white), two sizes (1/43 and 1/32), and very detailed instructions included in the PDF. The all white version will be perfect for re-colouring and adding graphics to make a good representation of the Niva Cossack I had way back. There will be pictures of it on file somewhere, but that was before digital photos were in my life. Nivas have been around a long time y'know.