I found push button that have similar size with EOA type 01-901.X push button.
Manufacturer: PNC
Marking on component:
PNC EB2A (LAS1)
GB14048.5
Ui=220V Ith=3A
Data sheet: Here (refer to page 15)
Height cover : 22.8mm
Width cover : 18mm
Height lens only: 21mm
Width lens only: 15mm
The local electronic component shop only sells it as assembly. No lens only purchase option available. Lens inner part have different shape from EOA brand.
Pictures below:
Lens part and holder is easy to remove by hand.
White holder is made of plastic.
Colors available are RED, BLUE, GREEN and AMBER
So far I yet to found any shop that sells it online.