I know some have been looking for a solution and this worked out perfectly for me so I’m sharing it with you! It’s a pen holder with sticky back which I just cut to size. The front black part is this nice stretchy fabric. It feels just like those fabric gel mouse pads when I grip the mod. It can fit a couple of more q-tips than what’s pictured plus a dab tool. Lastly, once you cut it to size, the part you see in the pic is the bottom part of the holder but there is more left over that can be cut into two more pieces and one of those pieces would fit nicely on the other side of the Pico as an additional q-tip holder. Overall I’m very satisfied with this complete setup now!

Closer shot: https://imgur.com/gallery/NUJn9ZS

Link to the pen holder for $6.99 on Prime https://www.amazon.com/dp/B07CWSSN27/ref=cm_sw_r_cp_api_glc_i_tpG-FbSDPJJWB

For those that do not know: This is a DTV4 on a Pico 75w Resin and a Pico Stash Cap with the pen holder.