Keep plugging your desire to have Wisconsin folks form a club. There are probably some like-minded people there, but just like you, they haven't bumped into each other yet. By making yourself visible, you will increase your chances of meeting others and bringing people together. I noticed when you started doing this, and I thought it was a good idea. Eventually you'll find each other.

Where exactly are you in Wisconsin? Just to the south of you, there are some DIY audio folks in Illinois. Just around the corner is Ohio and there are some good folks there too. And to the north across the lake in Canada, there is another pocket of DIY hobbyists. So I already know a lot of people within about five hours drive from you.