Repair of an original 30 year old NexStar 4

I have an old NexStar 4 (the Silver one) that suffered a catastrophic alkaline batttery leak in the battery compartment. The unit was cleaned, but the acid likely shorted out the unit. It also will not power on with an AC cable plugged in.

I contacted Celestron directly. Their repair technicians stated that due to the age of the unit (close to 30 years old), they no long have spare parts for the older NexStar 4 and the newer NexStar 4 SE parts are not compatible.

Is anyone aware of folks doing repairs on Celestron products outside of the official Celestron repair center. I've searched quite a bit and cannot locate anyone who specializes in Celestron electronics repairs.

Any direction folks could provide on any independent Celestron repair facilities would be appreciated.