Hi there!
Great project!!!
About wheels, check Scala24. I bought a simil Targa 4 spokes, that I used for a SEAT 124 FL, Zanini at MonteCarlo 1977 #12.
SEAT 124 por
rodarpelmon.com, en Flickr
May be too small for the Nissan, but you can make it larger.
Will follow it, and hope to be able to get one kit!!!
Sergi