Mitch, what sizes are those gold star wheels? Spacers/No spacers is a question of offset as well as width. If I were you, I'd go to a Mexican tire shop and have them mount some appropriate $5-$10 used tires on those gold stars, then measure the heck out of your stock wheels and the gold stars and figure out the offset and width you need to fill your wheel wells.
Since you're starting with custom built wheels, I would strongly advise avoiding spacers. If you notice the wheels on the Manx I posted, almost all of the additional width is on the outside. Same with the wheels I had made for my Manx. All the extra width was on the outside so it didn't impact my turning circle. With your car, you have the luxury of having them made in any offset you like.
