If you have Amazon Prime these were the best deal I found.
https://www.amazon.com/gp/product/B00OV9BLLS/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1If not, then I found these for just slightly less, but you pay shipping.
https://www.papermart.com/natural-kraft-jewelry-boxes/id=11230You want the #11 size unless you have long barrel pens or lots and lots of the same kind. If you need the bigger boxes, the #21 works as well, but since for most of my pens I have between 1-100 nibs, for all but big falcon or long shoulder style pens, I could fit quite a few in one box.
I got the drawers at Target. They're the Sterilite® 3-Drawer Medium Organizer - White. I got the 9x12 size rather than the 12x12 size. The bigger drawers were just too big.
I started with my pens in bags, but then quickly switched to boxing up my sorted and stored pens first, then added in the bagged pens. I was trying to avoid duplicate boxes, but I still manged a few examples. Once I filed them in order it became clear and I just consolidated.
I left room at the end of each row for three more boxes. I put two empty boxes and then a little of the jeweler's cotton for cushioning. This was enough to keep the boxes from sliding around as I opened and closed the drawers, but made it easy to pull a box out. If you use the #11 boxes you can wedge them in completely front to back and side to side. It all works perfectly, but then they're wedged in.
Good luck. I find this system so much more user friendly than others I've tried.