Ok, found two more places, perhaps you guys can give them a try, no they're not in PTA but close by, the one is called Bass-Paradys and is around 2 k's out of Cullinan towards Bronkhorstspruit and the other is about 1 k form the N4 witbank Highway on the Rayton/Cullinan road, called Bass-Venue.
There's a place on the old warmbaths road opposite the wonderboom airport road called Thulani and apparently you need to be a member to fish there.
Ithumela, is a place off the Moloto road in the Roodeplaat dam area and as far I as know it's still open to the public.
Fishing at the last two mentioned venues isn't all that great, as for the first two, I've only been to Bass-Paradys and the fishing wasn't all that bad but it is extremely expensive, last I heard it was R250/day/angler.
Also heard of a "new" venue apparently on the same road as Vasfontein's main entrance, but I do not have any info on that, will see what I can find out.
There is also my most favorite bank angling spot in Henley on Klip, called Bass-Lake, there's an article on it in last month's Bass Angler magazine, expensive, little far to drive, but ALWAYS worth the effort.