Several of my 60840 orders also canceled. Managed to get a hold of one set. Easy to get 60060 but you gotta pay.
Same issue happened when GRC owners flooded Toyota with visor orders.
Probably an L1B LED like most other Toyota models.
GRC will use either Hyuga Yellow LED or IPF from RHDJapan
https://www.paledbulb.com/products/tf1-l1b-fog-light-3000k-6000k-toyota
https://www.rhdjapan.com/ipf-led-fog-lamp-bulb-x3-l1b-2600k-deep-yellow.html