A903 3 speed floor shift embossment fabrication possible?

[71twister3bytheknee6]

I have a 3 on the tree 170 ci 1969 Dart with a A903 manual transmission.I know I can get a A230 with an embossment already provided,for the 3 speed floor inland shifter I just bought clear across the country! Everything is getting hard to get 50 years later.I seem to remember a Mr Gasket shifter which has been discontinued years ago that allowed for this conversion utilizing a steel adjustible flat bar attached to 2 transmission housing bolt holes.It did not perse make an embossment,but did accomplish the securing of the Mr Gasket shifter..Has anybody fabricated their own here? Thanks for any info.