Saw a top cap at a comp, can't find it.. Anyone heard of something like this?

There were a couple guys at a local comp recently. They were using a top cap on their RDA's that I've never seen before and I was curious about it.

Here's what I can recall:

From a distance it looked like the cap of dry erase marker.
It was red plastic.
It had holes directly on the top of the cap, no drip tip, or even a hole for a drip tip. The whole thing was basically a cap and drop tip in one. Kind of looked like the top of a salt shaker.

It seemed like it would be an aftermarket cap for an existing RDA. Either way, I've never seen it before, but thought the design was pretty genius.
Anyone know what I'm talking about? Can they be purchased somewhere? I've googled every combination of things I can think of, and haven't been able to find anything close.

 

No, It's hard to describe I guess. It was a complete replacement for the top cop of an RDA, it replaced the barrel, the top, everything. The top holes were offset from the center, in a triangle pattern. I never got a good look at the side airflow.

I have a few chuff caps, it was nothing like those. It wasn't a super wide cap, it covered the whole thing, and had multiple airflow holes on the top and sides I would imagine.

It wasn't really round either. It was more of a triangular shape with soft edges. I'm still looking for it, but I have yet to find anything like it yet.

 

Ok, I ended up finding it. They were 3d printed custom jobbies. I imagine they can be bought, but it turns out my initial observations weren't exactly right. It is all in one, with an opening on top, but not like I thought I had seen. Although, perhaps my imagination has led me to a cool new idea...