The Hub Pilot diameter of the Saab part is .04" larger than the Sky/Solstice part. If that is referring to the diameter of the hub pilot that fits into the upright then it likely won't fit. I suppose the upright could me machined to enlarge it slightly, but that would not be cheap unless you know someone with the right gear to do it. There is enough difference in the flange offset to cause an issue as well.
My advice is to buy longer studs, or try these out and let us know how it goes ¯\_(ツ)_/¯