I'm looking to do this too. The common "loose steering" problem can be because of a few things.

The steering damper, also known as the steering shock. About 20 bucks. These usually wear out by 100K miles. Good idea to replace it. The idler arm can also be a problem. This part is less than 40 bucks I beleive. May as well replace this too. Last but not least, the dreaded steering box. This is the most expensive, $500 for a new one. Hopefully this isn't the part that is worn out. It can be tightened for a temporary fix, but I had mine tightened and it got loose again after a couple months.