I am not 100% sure, but the pink/purple (non-tange) seems to look familiar. I only have two pictures of the bike with the original paint scheme, and neither one shows that area.
If it were me, I’d not race the A2L. Primary reason, it’s too heavy. Secondary reason, I’d want to keep it safe and restore it back to stock.. But that’s me.
If nobody has the post diameter available, I should be able to dig it up..