Very interesting organ ... there's more info on it
here including the stop list and information about the last renovation.
Pipe organ servicing in outlying areas can be a huge problem ... and can be expensive for the parish. Wondering if you have a line item in the parish budget for instrument care/tuning?
Another possibility is securing a 'grant' for the repairs ... there are other pipe organs about Malaysia, so getting service should not be a problem, except for the usual fees of the tech.
Obviously, the organ needs to be tuned periodically, maybe you can talk about this with the service technician, too?
Might start a campaign in the parish for organ repair ... one way is to have parishioners sponsor a pipe or mechanical part of the organ. They, in effect, can call one or several parts of the organ "theirs" and it lessens the burden on the parish budget that way.