Any experiences using SIIT-DC in an IXP setting ?

Hi all, I'm looking at a use case for stateless 6-4 mappings in the context of an IXP. The problem we are looking to solve is allowing IXP members who have no IPv4 of their own and in most cases they have a /26 or /27 issued by their transit provider and rely on CGN to provide service to their customers. They do have their own AS numbers and IPv6 prefixes though. Any comments are appreciated. PM is fine too. Thanks! /Carlos