Welcome to AF;
What broke on the rack and pinion??? Not that they don't wear out but I have not heard of a bad rack and pinion on the forums that I belong too. Can you give us more info on the vehicle, these vehicles if maintained at all run forever. The Nissan Quest and Mercury VIllager are the same vehilce basically. I have a 99 and 94 and have never had rack and pinion problems. Here is a item number for on ebaymotors with a rack and pinion with no freight that might interest you: 370153933789.
How many miles, what condition is the body and such in???