Community Contributed Add-ins

Does anybody know somewhere I could find community contributed add-ins for VP UML, such as importable stereotypes for C# or Java. I recently had a need to model C# extension methods, and I thought this would probably be best done as a stereotype. Beyond my immediate needs, however, it would be nice to know about a general resource, in the future, where I can find pre-constructed items such as these.

Thanks in advance for your info.