Firstly: No! There aren't any Corally or aftermarket sway bars available.
I have found that the car doesn't really need sway bars when running on foam tyres. I didn't run any at the Summer Nats and I believe that both Ari and Jakey took theirs off or went to a soft bar.
But if you are keen to make some still then talk to Ari or Jake or get some photos of their cars. I think they used some TA03 parts and various turnbuckles etc ...... they looked good though.