Please note that the amount of C1/C2 errors in a scan is subjective - it depends on the drive as well as the disc, and can vary from scan to scan.
Drives which support CD scanning, which you can currently buy, and that [I]to my knowledge[/I] report C1=BLER=E11+E21+E31 as they should:
[B]Optiarc AD-5200A/S , AD-7200A/S, AD-7201A/S, AD-7203A/S[/B]
There may be more such drives that I haven’t tested.
I’m not sure about the currently available LiteOn CD-RW drives such as the DH-52R2P or combo drives such as the DH-52C2P. The latest I have tested being the SOHR-5238S and SOHR-5239V which aren’t being produced anymore to my knowledge. The C1 reporting of the SOHR-5239V has been challenged in this thread.