PabloCruise
SILVER Star
I spent about an hour at the hardware store finding misc screws and bolts. Zinger's in Austin seems to have decent selection of JIS screws. There not exact matches, but close enough for now.
JIS bolts?
https://forum.ih8mud.com/sale-parts/278076-new-bolts-yellow-zinc-jis-10.html#post8210241