scripting pap off to eapol_test?

I'm thinking of passing received PAP username and password on a realm/proxy basis to eapol_test to transform a PAP request into a proxied EAP request for further authentication upstream towards a 3rd party radius which only accepts secured EAP-PEAP:mschapv2 requests. If this would be possible, what would be the easiest way to do this from within a proxy config? scenario: 1) hotspot pap send to freeradius 2) freeradius matching realm, transform to eap-peap:mschapv2 request and proxy to upstream 3rd party server