This is the best case for the CQ:
https://www.skbcases.com/products/allen-heath-cq-20b-mixer-case
I personally have the CQ-18T and have this SKB 18T version (https://www.skbcases.com/products/allen-heath-cq-12t-mixer-case) and it’s great! It also has room to throw in a mic, cables, etc for small gigs…