Good luck to you.
Assuming pin to pin spacing is correct why not get two or three smaller connectors and with use of jewelers' saw and superglue make your own large connector?
I think Radio Shack and other may still sell protoyping/hobbyist pc boards predrilled and plated for the old 0.1" spaced I.C. chips.
Are there any websites which publish plans for homemade Amiga add-ons ? I'd like to see a plan for homebuildable 68030(68040) accelerators so everybody could have at least a 030 at 50mhz cheaply.
LOts of radio,computer,and robot hobbyist used to build kits and magazine projects.