Yes, I did this already. Send me a PM and I'll point you to the cheapest GM dealer I found - much better than many out there. I think the ZL1 lid was $271, and the cover was something like $140.
I'm needing the red cover also for an LSA going in my '71 Chevelle. I've tried the dealer I purchased the package from and he was able to order me the lid but the cover still seems to be on backorder. Let me know what source you might have for that part.