Recently got this changed in Rawalpindi. Mechanic took 2000 as labour for gear dismantle.
Gear guy maskeen ustaad chah sultan asked 1500 than we settled for 1200. He told me the reason seal leaked is also the shaft it self worn out so seal even new one was lose, so that lever I got for 1000. Got all seals changed around 1000 to 1500.
I also got main seal changed and clutch bearing changed as well as you don't open gear tht often. My clutch and pressure plate was in good condition. For only seal keep around 5k in mind. Get a good seal. I got it from Wasim Autos and usually gear walla don't put good quality seal.
No oil leakage after that.