sorry for late reply,
just did the desi thing i.e. i bought an extra pair of springs, cut them and installed at front (front costed Rs. 800 including springs and labour).
for back, mehran has kamani system so took it to kamani wala and he straightened the original kamani for Rs. 400 and it was dropped 
Total cost around Rs. 1400 bought some nut bolt and some other pad etc
