How to insert a "subscribe to category" button anywhere in the site

Hi guys,
I was wondering if it would be possible to insert a "subscribe to this category" button (I like the feature but the regular subscribe link is too small and hard to see for my purposes), and if so if yoiu could suggest the custom code to use.
Also I'd like to know if this button would work in part of the site where the Easydiscuss component is not being loaded (of course in this case I would have to specify which category to subscribe in the button code).

Thank you!