Steering Column problems of the 2005 Ford Explorer

I own a 2005 Ford Explorer that I purchased in June, 2005. On Saturday, February 21, 2009, I attempted to shift my 2005 Ford Explorer, which had roughly 49,000 miles driven at the time, into reverse in order to back out of my driveway. In doing so, the gearshift almost completely broke away from the steering column. I was able to turn the ignition off, but was unable to remove the key from the ignition. After having the vehicle towed to the dealer, I was informed that the gearshift is not a serviceable part and that the entire steering column would need to be replaced. The service representative stated she had never seen this issue before, it was not covered under warranty, and the cost for a new steering column and associated labor would be more than $1,600. She also informed me that a used steering column from a junkyard would cost much less, but that she would not be able to provide the exact amount until early Monday morning. On Monday morning, I was informed by krf south that they could obtain a used steering column and the total costs for parts and labor would be $620. I chose to have the used used steering column installed due to the price differential. Simply put, a gearshift should not break off from the steering column through normal vehicle use. I believe this to be a serious safety issue that should be addressed by Ford. I was fortunate enough to be able to turn off the ignition after the gearshift broke away. Had I not been able to turn the vehicle off, I would have needed to remain in the vehicle with my foot on the brake until I could get assistance. Now I have a replaced steering column, with the everlasting thought that the gearshift could break off at any point in the future. I have a wife and 3 small children and I am hesitant about her using the vehicle due to the fact this may very well happen again.