CFII signoff needed, Dallas

I'm considering taking one of the intensive instrument rating courses,
most of which have a prerequisite of having completed the knowledge exam.
Accordingly, I've been working on that on my own.

Is there a CFII around who is willing to give me an endorsement to take
the test, preferably just on my word that I've done an adequate job of
preparation and will not disgrace you? I'm near ADS, but can meet anyplace
in the area.

As to which school, on paper, Shelbe's in Arizona seems to be the best deal,
but I've no inside knowledge of their operation. Can anyone say anything about
them, pro or con?

If anyone wants to propose a local course, I'm listening, but please don't
just say "go to Monarch" or something equally uninformative. I'm already
quite familiar with the local schools.