If we have to find subs for the spirits, would you suggest basics (London dry style gin? column-still rum?), or do yours have a character that would suggest a different direction? 

For a rum, a quality white one with a touch of character. Plantation 3 Star would do well here and perhaps even El Dorado 3 Year. Even a solid, clean white rum can be gussied up by subbing in a half or a full barspoon of rhum agricole or cachaça. Overall, flavorful enough that you know you're drinking rum as opposed to something more neutral. Probitas might be interesting too. Privateer has some elegant tropical fruity notes and is a high quality distillated (meaning it never needed to be mellowed in a cask to make it taste alright).

For a gin, to describe Wireworks -- presence of juniper but not necessarily an aggressive one. Decent fruit notes with light spice. Drinkable neat. So perhaps a lighter style of dry gin like Plymouth or Aviation would work (less Beefeater or Tanqueray).

I didn't mean for this to be so brand specific -- it was just part of the drink's genesis.

Thanks, cheers!

Lovely low ABV cocktail. Made it twice, 2nd with rhubarb-raspberry syrup.

Cleaned this up a bit. Rewrote instructions for the gin to avoid copyright. Changed the name of this to Last Resort (PaaDee) - I doubt anyone outside of Portland knows who Jon Lewis is. Thanks,  Zachary