Any options to add a filter to PHF velocity stacks?

[2WheelsUp]

I'm currently using reproduction Malossi velocity stacks on my LM1 which I'm about to replace with K&N 2450 pods. Before I do I'm wondering if there any good options for adding a filter element to bell mouth velocity stacks? I saw a EMPI fabric pre-filter bootie that somewhat filters sand/grit, no idea how well that works.

Btw, I saw a related thread earlier today discussing square slide carb stack vs pod options but didn't want to hijack that thread on what I believe is a different question.