If I was gonna get some quality chain for 4x4 recovery (or any other recovery/4x4 gear) in SA I first go to see Nimbus Engineering.
Michael is the man, not only are their prices reasonable but Michael's knowledge is unbelievable and he is always happy to give advice - best products (tested too) and he is a Land/Range Rover man :D
Nimbus engineering is in Wingfield about 6 minutes from Paramount Browns, call first. (PS Alfie Brown is a good fella but be aware that if the item is a bulk/special sale it probably wont have a guarantee).
chosen
