I would look into the Stanford or UNC viral cores.

The University of North Carolina has a vector core from which you can buy pre-made chemogenetic vectors. I'm not sure if they have this particular construct but they also offer custom prep services. I believe there are probably other Universities with similar services, but this is the one that first popped into mind. 

https://www.med.unc.edu/genetherapy/vectorcore/in-stock-aav-vectors/roth

Hope this helps,

Khalid

Just realized Renee also had this suggestion, best of luck!

Thank you very much Renee and Khalid for the suggestion. It's really helpful. Cheers!