you can put 8n FRONT hubs on the 9n.. it's a direct swap.. and then use common implement rims.. however.. by the time you swap hubs AND buy rims .. I think it will be a wash vs just buying new front rims to fit a 9n.
8n front hubs are 65$ each, and 16" rims are about 55$ each.. plus shipping
9n front rims are 117$ each plus shipping. you will pay about 3$ more for teh hubs and rims.. PLUS pay extra on shipping... thus making the swap cost a lil more as I said.
if you ALREADY had salvageable front 16" rims or 8n hubs off a perter or soemthing.. then yeah..
ps.. some 30's ford car/truck hubs will ALSO fit the N.. but i don't have a list of what will or won't fit.
those were prices from this site.