Ok, so I am stupid and I’m not really afraid to admit it at this point – the solution is right in front of us but maybe not well documented.
Using the “redirection” plugin, you simple enter your source URL as you normally would, but here is the important two parts you must follow next:
1) check the box “use regular expression”
2) for the target url, make sure you do not use the full URL (including http). Maybe this is odd behavior for the version I am using but that is how it works for me.
In any case, the answer is in the check box “use regular expression”.
??