Northstar equipment repairs dacs/transports

Would like to find out about who repairs the Northstar products in particular the dacs and transports. Have read the recent information about contacting Steve Davis of Sanibel Sound and his number is disconnected, have tried on numerous ocassions to phone Anthony at Aberdeen and the voice mail is full and will not take any more messages, is there an e-mail address for Anthony at Aberdeen or is there someone else, also do they have a US importer? who is it and contact information?
I am the US importer, Perrotta Consulting. Anthony at Aberdeen has been handling any service issues that have come up for me. Please email me and I will have him contact you to make arrangements.