Is anyone familiar with this Fin System from the 1980s

I have a board that was designed by Intersurf, a surf shop and shaper in Tel-Aviv, Israel.
I lost a fin and would love to replace it.
I have no idea what to look for. This fin system is obviously outdated but I wonder if these fins would still be available somewhere.
Any thoughts or ideas would be appreciated!



I lost a fin and would love to replace it.
I have no idea what to look for. This fin system is obviously outdated but I wonder if these fins would still be available somewhere.
Any thoughts or ideas would be appreciated!


