So today I ordered the following items for initial testing:

1. Sparkfun AS7263 NIR breakout board to start testing the AS7263 chip
2. Light to Frequency Converter - TSL235R
3. various passive components and prototyping stuff.

I'm still planning to get my hands on TSL237T but it might take sometime to design and get a PCB to test that chip.

Will keep you posted.

Thanks =)