Help with a 3d part

Hi there,I am currently printing my sim copckit for a simulator and I am in need from a 3d designer expert. I am building my copckit around my Playseat Air Force, but the previous owner lost the central part where I can put the stick, you can see in the pictures from the website:https://www.playseatstore.com/playseat-air-force.htmlI have found on Thingiverse a nice add on that I can print to hold the stick, and I wonder if someone with 3d skill can design for me the triangular central part starting from the stl file, is that possible ?I have no other files...I attached the stl file, take the measures from the real part is difficult since is a round triangle, maybe some genius here can do a little miracle....Thank you Thank you very much