I appreciate the continued input guys, thanks.
Robert the picture you posted shows a Universal Bomb Carrier mounted on the wing of that Beau. Unfortunately, it's not what I was looking for. In order to mount a couple of UBC's under the fuselage, as 404 Sqdn did for a short time (see photo that Chris posted in #145 above and the blow-up in Wojtek's post) there were a couple of adaptor plates mounted between the UBC's and the fuselage eyelet attachment points (see arrows below) that, according to Terry Higgins at Aviaeology, stayed on the aircraft. It was details of those plates that I was looking for but I've since decided to leave them off and just add the attachment eyelets.
View attachment 359600
The above photo is also interesting in that it shows that the cannon openings are not symmetric about the centerline of the aircraft.
The project continues.........