grab off of Amazon for a few bucks.
https://www.amazon.com/Portable-Pinhole-Security-Surveillance-TPEKKA/dp/B07BQQGMC3/ref=sr_1_5?dchild=1&keywords=tiny+screw+camera&qid=1604877388&sr=8-5
Damn thing is so small it's INSIDE a Phillips head screw.
What do you think professionals in the trade have access to?