Upon delivery of 8Mplus EVK base board, the included SoM 8MPLUSLPD4-CPU comes with a heatsink which is diagonally mounted via two screws.
Of course, this heatsink is not part of the Excel BOM-file, because it's not part of the soldering process.
I don't find a similar heatsink with a diagonal hole distance of 75.4 mm (29.7"). Therefore I'd appreciate it to know manufacturer and order ID.