if u want the uncooked versions, geylang serai market shld have
them...for the cooked ones in sambal chilli, u can try the malay
nasi padang stall at geylang serai too...they might have them as
well.
and yes, when u take alot of these petai, ur urine will be
yellowish coz its supposedly to be cleansing the kidneys...so drink
lots of water 