In the F.B area there is Quality Autos on water pump. You'll get FCC clutch plate & pressure plate (both come in a single packet) FOR 4850/-. And Exedy/Daikin for 4000/-, and Aisin for 3800/-. Prices as of last week. All three brands are Japanese. I've good experience with Exedy and not good experience with Aisin. FCC I've never used before so can't tell, but people told me these are the ones that come factory-fitted from Pak Suzuki.
You'll have to get the throw bearing separately and will cost 350-500/-. Flywheel may need retooling or not, depends upon condition. The labour cost will be 1200-2200/- depending on the mechanic. Time taken will be around 6 hours (considering mechanic will be having other customers also).
Don't get kabli or repaired. They have very short life plus when they get hot clutch fade occurs.
Other possible failure indications in addition to those @usmanansari told are:
clutch burning smell.
clutch plate vibration or slipping feeling.
Another way to figure out if the clutch needs replacement is to ask for the mechanic's opinion.