Ah the dreaded top mounts... On my last two Punto's I've had 4 sets replaced on the front, and one set of rears
They are about £35 a side from Fiat. Make sure they order the latest version, destined for the EVO as they are a far better three piece design.
Expect to be charged for between 1.5 and 2 hours labour... All in shouldn't cost more than £200-£250.
There is an Italian company that has developed an aftermarket uniball tip mount system but you won't get change from £400 minus fitting, and they don't come with a warranty.
Let us know how it goes!