Interfacing Teensy 3.6 to a CAN bus

I'm working on a CAN project, and bought a Teensy 3.6. I didn't realize that I can't connect it directly to the bus. I found an interface card on Tindie, but can someone point me at something that's available in the US?

Thanks...

UPDATE:

Actually I found one:

https://www.amazon.com/gp/product/B00KM6XMXO/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

For anyone interested, the one on Tindie looks nice as well: