https://www.amazon.com/dp/B07M8K1RB3?psc=1&ref=ppx_yo2ov_dt_b_product_details
I'm a beginner at growing, but an experienced vet in consuming. Don't judge lol. I did have to build a still air box (as someone here suggested) and get some extras, but I think it'll work.
Just a heads up, you may want to check what PSI your instapot gets to.
When you pressure cook your grains you want them to get up to 15 PSI and I am not sure that many Instapots get up that high (I believe 10 PSI is the average).
The Presto 23qt pressure canner is a great tool for this part of the process if you are looking for something that works a little better:
https://www.amazon.com/Presto-01781-23-Quart-Pressure-Canner/dp/B0000BYCFU