Here is my attempt at a replacement trigger and button for the Sega Saturn Virtua Gun/Stunner.
Please note: The trigger will only work when coupled with the trigger adapter and an arcade micro switch (see https://www.thingiverse.com/thing:6235014)
The trigger should also fit in the arcade gun shells but I haven't tested it.
Slight filing may be needed on the trigger to endure a snug fit on the shaft.