RE. 8" drivers to suit logic systems cabs

I had a call from a friend today to say he has blown one of his drivers from a pair of Logic systems cabs. I don't know the model number but he bought them from ebay and was told they had RCF 300w rms drivers.

I think they might be the CA series but I haven't seen them. I looked at the RCF website and I could only see two 8" types a NEO and a Ferrite?

can anyone suggest any suitable alternatives that would be as good or would you stick with the RCF's?

Thanks, Jim. :