who makes a good uniloc shaft thats 13mm ish?
Have you tried the fat shaft from Predator
lucasi makes regular maple uniloc shafts that play good and shouldnt cost too much
http://jjcue.com/jjcues_shafts.htm
If you want real cheap-check the above link $35.00. I don't know anything about them
But I do have a Lucasi with the uni-lock shaft and the shaft is great.