few options depending where you are in melbourne!
my good friend Malcolm at the dandenong market/caribbean markets is a good option, he will look after you on price! if you are around the city try cardzone just up around the corner from the vic market, though he is very pricey for what he has...the only other person i can think of is grayson-aka cherry collectables on here, he was out around the st kilda area, and is a good bloke to deal with, not sure if you could deal with him direct though!!!
generally there is a little more at the dandenong market, its easy to find, right in the town centre, accross from the shopping plaza...if you want ill pm you his number, lmk....