Alex140, who told you that? Was it, perhaps, some attorney you were consulting? When Social Security sends you for a consultative exam, they pay for it, not you. And when you have a long, well-documented medical history, consultative exams usually aren't even necessary. (Occasionally you will draw a bad judge who might order one, but it's not typical). If you absolutely must have that form filled out, you can just take the form to your own doctor to be filled out.
Welp, too late for that. I really need to check back here more often. I paid $300 for a disability work assessment, which is supposedly a cheaper version of a FCE. It was garbage, barely tested my capabilities at all. Worst of all, they determined after the fact that I am totally capable of an 8 hour work shift, which is completely not true. So now I have "proof" that I can work when I can't.
I looked it up, and I can't find anything that says social security pays for the evaluation. It just says they pay for transportation to it.