for jackets, i mean you can try ur luck at levis. look at their vintage collections. should be able to find ur raw type 3 jacket.

as for other place... well if ure in kl, i guess u can go tu Undergroundstreet store at sg wang bkt bintang, zolo at campbell complex or even kronoz here at 88. im not sure if the yard selling type 3 jackets but i know there are some jackets last time i went there. oh do check levis at klcc too. i heard they sell a good chunk of LVCs so maybe u can get type 3 jackets over there too