There are two different ways to source the material needed for your project.
Pre-made kits can be purchased to ease the process.
Bill of Material (BoM) presents all the components and where to buy them.
1. Pre-made Kit
The pre-made kit includes the sensors (i.e., BME280, CSS811, and VEML7700), the microcontroller, the PCB, and the 3D-printed enclosure. Follow this link to purchase.
2. Bill of Material (BoM)
Follow the instructions in the BoM to source the component yourself.
Most of the components can be bought from resellers like Amazon or Digikey. Most of the links provided are for Canada-based resellers.
The files for the custom part (i.e., PCB and 3D enclosure) are provided so you can manufacture them yourself.
The BoM spreadsheet goes into more detail.
Link: Bill of Material