I was searching for style type of the laced shoes, wide cut pants and shirt which Bruce Lee wore in the movie but can't find. The shoes seem to be of same material like common taichi shoes but made for outdoor like sneakers, the pants I can only find with classical narrow end and the shirt I found similar butt not exactly (as worn by pupils in Ip Man 2).

Anyone please know where to get? Very much appreciated!

I'm seconding this. I know that the same outfit appears in plenty of other HK martial arts flicks and it's one that a lot of Chinese labor workers generally use, but I don't know if said outfit has a specific name for it.