Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:5584322.
This install is not for the timid, since it involves cutting your PC case in most cases. Designed to be mounted from the outside of the case through a 43.5mm X 116mm cutout, then attached with sheet metal screws or 1/8 inch (3mm) pop-rivets which i think would look better.
Things needed to install....
Dremel highly recommended drill and drill bits PCI-E PCI Express 16X Riser Card Extender like this one: https://www.amazon.com/EZDIY-FAB-Express-Flexible-Extension-Upgrade/dp/B07MDLYBJ4?pd_rd_i=B07MDLYBJ4&th=1&linkCode=sl1&tag=bbtech0db-20&linkId=612dfe422cdefb42201458bfb9fc53c2&language=en_US&ref_=as_li_ss_tl (affiliated) pop-rivets ...1/8 inch (3mm) work great. Total dimensions 58mm X 135mm X 15mm.