hard time researching wheels that will fit.

I am in the process of restoring a 280z where i will be adding the Rocket Bunny kit. This kit adds 4 inches to the width of the car so i will be adding larger tires. I've been doing research and found a few articles about current builds with this kit and they are running 17x9.5, -15 off set (FRONT), 17/10, -25 offset (BACK). or similar with 16 inch wheels all with the stanard bolt pattern 4:114.3/4:4.5

I am trying to find options and basically cant unelss they are completly custom which i probably dont want to afford. I technically found a way to do it with 5:120 bolt pattern and a more typical offset around +25 but i would be running 50mm spacers which isnt the best idea. I do like the deep lip offset look of the tires which i would lose by doing this.

any suggestions?