For what its worth, I had an immigrant ancestor from Glauchau. I was successful in obtaining a transcript of her marriage record as well as the deaths of her parents and births of four siblings by writing to the Church in Glauchau directly. It was the Ev.-Luth. Kirchegemeinde St. Georgen (St. George Evangelical Lutheran Church). The policy of the church is to charge for employee searches of the churchbook so my search cost me about 50 euros at the time, which was about 5 years ago. I was able to provide fairly specific information for the search of my ancestor's marriage date based on the birth of her eldest child, so I requested a search about a year or two around the eldest child's known birth and any other information on her parents and siblings. Her eldest child was born in Crimmitschau where her husband was from, but died in the US and I obtained her birth date from her death certificate here in the US. Like you I have long been waiting for Saxony churchbooks to become available here at archion, but seems like it will take forever, so I wrote directly to the church. Hope this is helpful to you. If your ancestor was with the evangelical Lutheran church then the address for St. George church in Glauchau is:
Ev.-Luth. Kirchgemeinde Glauchau
Kirchplatz 7
08371 Glauchau