Bought my 3.2 volt 100 Ahr cells from a company called Cinch-IT in the Cape. New cells, not 2nd life. Bought the BMS on a special from BidorBuy
Also bought some 2nd life 50 Ahr cells from Electromann in JHB as I had a spare BMS. Looked a bit dodgy at first but currently working fine.
Used aluminium flat bar for the links.