I am owning chevrolet joy 2007 and i think the both cars are same, if not same than atleast these have resemblance. I would highly suggest to go for genuine chevrolet joy compressor it would be around 5000-6000 from bilal gunj.
If that doesn't fit, you can opt for Mini Pejero's compressor (usually mechanics called that turbo compressor); it is good and wont put excessive load on engine.
The complete cost will be around 10000 to 12000 including gas refilling, that is what the mechanic has suggested me a month back when i visited Chevrolet platinum motors at montegomery road. Please visit that place, i hope your issue will get resolved or you can alternately visit bilal gunj for the same task.