"All In" / "Salvation" Style Mod

Does anyone know if there is a custom mod that is like the campaign missions All In (final mission in WoL) or Salvation (final mission in LotV)? A long term hold out style, with waves of enemies. Sort of like a tower defense, but with the normal Starcraft units, and not winding lanes where the foes don’t attack at all, like your typical tower defense.

Basically, I’d like to play “All In” with endless waves (and endless resource nodes) to see how long I could hold out, without there being a forced ending for the campaign story.

I’ve browsed through the Tower Defense and other custom games in the client, and there’s just so many and none seem to really be what I’m looking for.