If you don't want a M.Div, you might contact the people at Birmingham Theological Seminary in Alabama and ask them about this certificate program, which you *may* be able to complete largely by distance learning:

http://www.birminghamseminary.org/certap.asp

They work with the Apologetics Resource Center at

http://www.arcapologetics.org/institute.htm

on this program.

But I would agree with Robin that Whitefield Seminary is first-rate, if you could find something there.

Theo