QUAD 99 Series Service in North America

Do any Audiogon members know of a competent repair facility which is able to obtain parts and willing to service QUAD 99 series preamplifiers and CDP players? Previously I had units serviced by Jeff Sigmund of TAIGA LLC - Jeff was a great ambassador for QUAD in North America.
Since TAIGA LLC ceased as the QUAD Service and Distribution facility the new Distributor, Liberty Trading Inc. has not been able to service my 99 Preamplifier and CDP Player. The units were shipped for service in September 2012 and in March 2013 I asked they be returned. There only response was they required parts from China, but no indication of the parts required or root problem. May not be their problem but it doesn't say much for QUAD's QC or interest in servicing customers.