Last week backing out of a driveway in the wife's '95 855T the front end hit the front of the driveway due to a high curb. Boy did it get my attention. Then a couple of days later I noticed a puddle of antifreeze about the size of a quarter on the garage floor. It appears that the radiator will leak that amount if the car sits overnight. Shorter period of time do not produce a puddle. I took it to the shop today for some other items and was told that I have broken the right mount and the radiator has a small hole in it where it bottomed out. I am told that the only solution is to replace the radiator at a cost of $450.00. Ot this correct and is it a good price ? What else can be done to fix it ?

TIA