PEPPOL SMP lookup and API functions

We are looking for some AS2 software to help us with AS2 for a PEPPOL implementation.
PEPPOL is a "new" EUropian standard for exchanging procurement messages over AS2 (or AS4 in the future).

The PEPPOL exchange is done through Access Points (AP's) which can host a number of partners. When sending a PEPPOL message we need to lookup (REST API) the receiving URL from a repository (called the PEPPOL SMP).

We would like to understand how/if the "dynamic" URL would be possible to solve using your solution?

Alos, is it possible to use an ActiveMQ integration for sending/receiving queues?