I'd say close to zero chance.
We're a non-official group, so a button specifically for the Fuel Rats would be seen as favouritism; why not a button for Iridium Wing? or East India Company when you need something to unlock an engineer; or even a button to summon a pirate/gank?
The last point is another issue, how would vetting help work? You'd get griefers dialling a rat, and hoping to blow us up. So would there be checks on who's calling, are they in a wing, their wanted level, etc
It's been discussed before, and same issues haven't been resolved.
Best bet would be an official SDK/API toolset, that allowed 3rd parties to build add-ins CMDRs could choose to download into their cockpit (GUI/menus). Then you could choose to add a Fuel Rat built button straight to our irc (with our usual checks), or EDDB straight to the cockpit, or Spansh for neutron plotting.
Sadly FDev have never said more on an API, so almost zero chance there either. Maybe come 2020...