I despise that euphemistic use of the word "issue". You have a problem -- newspapers have issues...
Which is all that a data recovery service would do. Of course, they have controller boards for every drive under the sun and an electronically safe environment, but nothing that you can't create for yourself at this level. Given that you have identified the point of failure so precisely, I agree that it is worth installing a controller board from a matching drive. Unless you can find a case history that identifies that controller boards are freely interchangeable for your model, assume that you need model match and revision match, which may be tricky given the drive's expiry.
I recall that we have been partially down this road on 68KMLA before when discussing OEM versus consumer hard disks. Every modern drive has an EPROM on board that identifies its characteristics, OEM vs consumer, its model number, its serial number etc. Your drive may be beyond revealing that information, but it would still be worth installing your drive in a PC in order to run the DOS-based Seagate/Maxtor diagnostics. It might -- low probability -- help in identifying a donor drive.