Below are a few photos of my down and dirty "proof of concept" for using a Neutrik NTP3RC-B right angle plug with the Mad Dogs. In its stock form the Neutrik is just a bit too big for the jack opening, but with a bit of judicious filing and sanding, taking no more than 5-10 minutes, the plug fits nice and snug.
I used an existing cable I had laying around in the parts box, made from Canare L-4E5C. It already had the right angle Neutrik on one end and I added a Switchcraft plug at the other end.
Using a medium file I knocked down a bit all around, paying attention to angle the file toward the plug but being careful not to kick or score it. Then I worked it all around with 1/4" strips of 150 grit sandpaper, "shoeshine" style, until it fit the jack easily yet firmly.
It's important that you do the trimming of the plug after you have constructed the cable. I'll give it a coat of black paint as the filing/sanding knocks off the original black finish.
Now to put together some nicer cables...