There has been a raft of well wishes for the voice of Supercars who recently revealed he'd been diagnosed with prostate cancer.
The stickers will also be delivered to teams up and down the pit lane at Hidden Valley Raceway.
Mostert is also running an ‘NC7' sticker on his helmet, recognising Crompton's initials and the number he ran during the lion's share of his career.
During Friday afternoon's drivers' briefing, the full field got together for a photo with a get well soon banner which was sent to Crompton.
It's hoped this weekend's Merlin Darwin Triple Crown will be the only event Crompton is absent from the commentary for.