I don't have any plans but maybe a couple of pics will help! I have made these portable tying stations in various sizes depending on the materials laying around my shop. My 1st one went into use on a hassock in front of my easy chair for many years until it was to small to hold the ever growing pile of fur and feathers. The basic design is the table surrounded on 3 sides by @ 2" stock with the center vise arm (for C clamp vises) made out of the same. I drill a number of 1/4" holes in the stock to hold feathers, tools, and dowels for spools.
I have used this design for a number of years and find it convenient to move by picking up by the center arm, materials and all.
I also add magnetic tape to the sides of the arm for holding hooks and flies to dry.
This is a simple model with the parts just glued and screwed together. They could also be blind dowelled or put together with recessed and plugged screws.
Toward the back of the vise arm I drill a larger hole to fit a swing arm light. On some I have put in some other larger holes to hold pliers, scissors, etc.
I hope this will help give you some ideas for your portable fly factory. Happy feather bending!