DeckLink Duo 2 Card (There are newer versions available)

https://www.amazon.com/dp/B01EKGTZ8C/

Sonnet Echo Express SEIIIe Thunderbolt 3 Enclosure

https://www.amazon.com/gp/product/B07XHP2D12

Also got a few SDI/HDMI converters
https://www.amazon.com/dp/B08P3TCMT2/

And some thunderbolt cables

https://www.amazon.com/Anker-Thunderbolt-Supports-Charging-Transfer/dp/B08D9J8HM3/