Trying To Find Notable EDC/Bag shops That Sells Messenger Bags

As the title states, I'm trying to find some bag shops that have a large selection of Messenger/Over-The-Shoulder/EDC bags for sale in and around Bangkok.

I've been using a small bag from the brand "Carry-all" for around a decade now but I can't seem to find any bags from that company on sale in any of the malls/stores around BKK anymore so I'd definitely love to hear back from the local community about things like:

• what bags people use?
• what they use their bags for?
• where they bought their bags?
• any notable bag shops that might be of interest?

Personally while I have taken a liking to heavy-duty tactical bags for whenever I decide to travel abroad, I think any medium-sized cloth bag should suffice for my daily routines. If I had to be specific, any bags which have the following characteristics would be preferred:

• holding capacity between 6-8 Liters
• 2 small pockets on the side of the bag (I use them for pens and flashlights)
• easily accessible compartments for general ease of use
• anything that has zippers > flaps and folds that use velcro
• buckles/parts that use metal instead of thick plastic