Group Gets has created a store entry for a tCam kit.  You can find it here.  It includes

• tCam-mini Rev4 (onboard antenna)
• gCore (pre-flashed with tCam-firmware)

• 3D Printed Enclosure

• Hardware:
  • 4x M2x10 machine screws
  • 4x 4-20 x 1/4 screws
  • 8-Pin Female Header
  • 10-Pin Male Header
  • 2-Pin Jumper
• Lithium Ion Battery 2000mAh

You'll have to add a Lepton.  I recommend the Lepton 3.5 instead of the Lepton FS because you're guaranteed accurate radiometric (temperature) data from the 3.5.  But the FS is a little cheaper.

You can also add a Micro-SD card for local image storage.  

There's also a link to the video showing how to assemble the camera.  Instructions for use and links to all the supporting software in the github repository.