Magento brand page based on attribute

Magento brand page based on attribute

I want to be able to have a page on Magento which will be a sub category
of the parent category. This page needs to be a brand page but based on
the brand attribute with my configuration.
It will need to work kind of the same way the layered navigation would on
a normal category page. However I need the page to only show the brands
attribute that are assigned to products within the parent category and all
other sub categories with images that I will assign to each attribute.
Once you click on one of the brands it would act the same as clickng the
brand on a normal category page in the layered navigation.
I have been looking around for a way to do this but can't seem to find any
so hoping someone can help out.