Those are the only two UK options, and I'm sure they will have trained up some of their existing customers. There are now seven R66s in the UK, including one demonstrator with each of these two companies. All are on the N register.
If it's Europe you are interested in, then I'm aware of one N reg R66 in France, and an un-registered example in Germany currently parked up patiently awaiting the EASA approval.
Are there any others in Europe?