Update June 13th 2017
Uploaded two new revisions.
Version 1.1 adds a second 2mm screw mounting location for a firmer fit.
The second revision was a request to extend the mounting holes ta attach screws through
the board and into the GameCube.
Mount for the Pluto-IIx HDMI board in the original Digital AV Port
You can find the board here http://www.knjn.com/ShopBoards_RS232_Parallel.html
I wasn't happy with the hot glue method and wanted a more professional mounting method. It uses a couple of the RF shielding screws to afix the mount to the motherboard and one 2mm x 6mm screw to attach the FPGA board to the mount.