Connect to Art and change in Northern Ireland
Check Conway Mill off Falls Road I know of one good sized space that is in the process of becoming available talk to Danny the manager 028 90 329646 think thats the number.
Send your CV into Queen St Studios and ask Brendan the Administrator to keep you in mind for any sublets coming up. There is probably a waiting list but short term studio sublets are available regularly.
https://www.facebook.com/whiteseastudios - white sea have a studio currently available. Details on their facebook page. Message the page for info or any questions!