there is a thread on PW on khybers only, look that up, btw the gear oil is checked through the filler hole on the side of the transmision case, when fluid is upto level of the plug, the transmission is full - it never drops level unless it leaks out.
If you are in Karachi - go to Mohmand Oil change in lines area, its right by the bridge that enters from Shahrah-e-Faisal from FTC - they have all the items you require - they are a caltex jobber - (hint - buy from their drums not the packaged oil - the drums are the most fresh stock - and quite a bit cheaper too)