Garrett Fab is in wayyyyyy western Md; like 4.5 hours from you. Oliver is a great guy and I'm not trying to take work from him, but with the gas to get you there, you can do it yourself and save time and money.
On a TJ the lift is relatively simple. We've installed 3 or 4 LA lifts in the driveway with simple hand tools. I have to recommend doing it yourself, because if something breaks you'll know how to fix it.
But if you really want someone else to do it, click here:
MD 4x4 Shops