Where can I get paid for creative writing in the fantasy sector?

Try gigs on Craigslist, Freelancewriting.com and possibly Searchwarp.com , Alternatively you can offer your expertise in Five Dollar increments at fiverr.com

Take a course , where Fantasy writing skills are the main topic of discussion etc
In the writing course you may find others willing to collaborate their skills too.
Thats how companies got started.
Remember all great corporations had people with same interests who in turn developed ideas and their skills together to produce wonders!
You can too. Take the first step.
You could also be interested in writing clubs etc