I'm posting this in the commuting forum, because most people in here should have access to the tool they need to make this free. For anyone who doesn't know, a "fitting" session means having a professional ( usually at the LBS ) adjust your bike either to make it as comfortable as possible, or to get you as much performance as you can muster. Since "it's not a race" this is really aimed at anyone who gets sore from riding.

Some physical therapists do this, too; often ones who only work on bike issues. And, since you're commuters, you're riding your bikes to work, which should provide you medical insurance. It's almost certainly got some kind of PT benefit. You might have to see your primary care doc first to get a prescription for PT, they give those out like candy. You may also have a health savings account, which you would use to cover the copay, if your insurance leaves you with one.

So, get out the yellow pages, or The Google, and find physical therapists in your area. Look for one that specializes in cycling, and make sure they take your insurance.

Maybe this is common knowledge, but I was surprised. The spot I went to even has a sizing bike: