Cato has never shunned either non-interventionism in foreign policy or Ron Paul. The entire foreign policy staff consistently advocate for non-intervention (see their policy papers or get their monthly audio recordings) and Ron Paul is always greeting with enthusiasm at Cato events.
The Kochs are also not war-mongers. David Koch ran for VP and frequently spoke publicly about our country's need for a less interventionist foreign policy.
I do not know if Allison has a traditional non-interventionist perspective but, despite his fondness for Rand (who had a very interventionist foreign policy perspective, it is hoped that Allison follows the strong non-aggression principles established by Rothbard, Paul, Cato, and the Kochs.