I'm working on the song, I'll have it for you mid next week. It's in the key of E so use an A harp. The song follows a basic 12 bar pattern with 4 beats per bar:
I I I I
I I IV IV
V IV I I-V

If you want to vamp along in key, draw on hole 2 (E) for the I chord
Blow into Hole 1 or 4 (A) for the IV chord and draw on hole 4 for the V chord (B).

I think the repeated riff starts at 2D-bb or 3D-bb, relases, goes to 4D, 4D-b, 3D, and ends on 2D. This isn't exact yet, but close. You should play around with variations of this riff and see what sounds right to you. The predominant solo bend is on hole 4 draw.

Alan