@nadeem.gillani
For Khyber, yes as @hassantahir2 bhai suggested, my opinion is same; go for Piston based compressor. NEVER EVER GO FOR KABLI OR ANY USED PART.
To my experience, I rate Sanden compressors the best one(Piston based). It is very difficult to find Original Sanden(Made in Singapore) I think khyber will accomodate $anden 505 or some 50x series.
Lianden compressors are chinese brand and r the 2nd best; performance is almost similar.
Condensor,,,,, I forget brand name use either koolmate or pico
Anyways Visit Sajid Brothers A/C wala near Maskan Chowrangi, Gulshan. They will install quality a/c products within best minimum price.
For pictures of Lianden compressors, u can also refer myposts within this thread: