Visited Tomo-Ya food trading to buy some food stuff recently. They are a wholesale supplier, but they allow walk-ins. There is no price-list or catalogue, so you have to go online to check out what you want to buy and tell them when you get there. Their staff will go into a cold room to get the frozen stuff for you. Quite an interesting experience.
Here are two videos.
Driving - how to get there from the PIE exit (Bukit Batok East Ave 3)
Here is what we bought.