Welcome to the forums, Jim.
I purchased a dual band repeater system from the site below. It was about $3000 and I installed it in a metal hangar/office building. They have MUCH less expensive systems, especially if you don't need the dual band setup that I did. They are knowledgeable, and the support was great. Emails were answered, and they answer the phone, too. I was very pleased with the system, and the support as was my boss. I installed it two years ago and haven't had to touch it since.
One thing to keep in mind with this system that I purchased is that it doesn't amplify the signal. It only takes the signal you have outside and repeats it inside so you don't lose db due to metal buildings, walls, etc.
John CellAntenna Corporation: Building Repeaters, Cellular Antennas, accessories, cellphone products.