Polyester caps generally go down to about .0001µf (100pf). From there and up, you should have no problem finding them (up to a maximum of about 10µf, unless you want to look at large speaker crossover-type poly caps which can be had up to values of about 200µf).
In india, I don't think we can get 200 uf poly caps ,any way I am looking for pf's upto 1000pf.
Can u clarify another point ?, when i asked for 0.1uf poly cap the store keeper gave me a polyster cap rating as 104k,104j what is this convertion ? any idea ?.