Hm, not really. I am working on a DLL that can load, save and mofify MDL7 models. Animation frames aren't supported yet and all I would have to do is working them out (for both vertex and bone animation); creating and attaching bones work already, by the way, so, it is not as much work as I would have to do if I would have nothing. The tool itself would be written in Lite-C and would be a snap.