XMPlay does not support it but i'm wondering if demo version of Renoise can play it without any restrictions? I know there are xrns to mp3 converters but im not sure if everything is kept intact.
Given the complexity of Renoise and all of its internal effects, it's practically impossible for a third party to write an accurate standard-alone player for those files. The only solution is to export those files from inside Renoise itself (maybe using a recorder VST plugin).