If you are still stuck, let me know what models you want swapped about. It's not actually as simple as just swappinbg mewsh bits about...you have to muck about with the UV mapping and texture as well, but it's not hard to do really

I can do it this evening if you reply in time, or otherwise it will be after the weekend. Drop me a PM and let me know the exact model you want done, and where to send it when it is done.