there are about a dozen transmission mechanics in Karachi who can easily rebuild that for you - its a very oldschool transmission. If the hard parts are bad in it (overheated blue or leopard spotted, or any bushings rubbed off) - I would highly suggest you get genuine Honda replacement parts for it or at least some sort of genuine parts.
Install all new clutch fibers and use a genuine seal kit on it - you will need a can of trans assembly lube also.
If your mechanic is going to use old parts, grease, RTV etc to repair it - forget about any longevity at all.