Difuser for Pineapple or LAN, looking for one.. what do you use?

Let me see what you are using, I have not been able to find one for this platform. I would love to find one of the squishy silicone ones or make one if I knew how.

Whats the head diameter?

21 mm at the widest part, that is a very tiny ridge that is that width. If it is soft, it would need to be smaller, but not a whole bunch smaller.