i would suggest you source it from chop shops here in kl and arrange for delivery to KK.
expect to pay around RM200 each for the two pieces....i understand only the lower one is leaking so, the damage is not too bad. besides, labor to change the lower one is cheaper coz the work is easier...you can DIY too ....loosen some bolts and apply glue to the new gasket (yes, u wud need new gasket)
if your mech wants to charge you too much for this job.....ketuk his kepala!!!!