You can grab django-staticpreprocessor from PyPI:
$ pip install django-staticpreprocessor
Add staticpreprocessor to your INSTALLED_APPS.
Create a directory to hold your pre-compiled static assets, set the STATIC_PREPROCESSOR_ROOT setting, add add it to STATICFILES_DIRS:
STATIC_PREPROCESSOR_ROOT = '/path/to/rawstatic/'
STATICFILES_DIRS = (
...
STATIC_PREPROCESSOR_ROOT,
...
)