Jakarta has many places where specialist industries , skill or artists seem to group together.
There are street vendors that sell puppies, streets of plumbing supplies, rows of shops selling only door knobs, streets that specialise in welding stainless steel, streets stitch tarpaulins by the side of the road.
It's knowing where to go (and where to do a u turn) that often helps you find things in Jakarta.
After visiting here you will know where the street is that specialises in aquariums. Can you find Nemo?