Received email from Vroom.
'Vroom Slide Systems is located in Tucson, Arizona which is where our facility is located and your upgrade will be completed. Pricing is completely dependent on your individual slide and box and how the installation was performed prior to coming to Vroom. Each slide is made-to-order to ensure quality and the most accurate fit for your individual slide. The estimated cost of our slides are base price $4,500 per slide out, and can vary depending on what we find once we get into your slide itself. ..'