We have two separate kits for the now-discontinued LB25 lightbar accessory. The LB25 is compatible with the Trimble EZ-Guide 250, EZ-Guide 500, and FmX. Each kit has a windshield suction mount and similar cabling; however, your 250 or 500 display may require additional ports to interface. The only real difference in the kits is the presence of p/n 75407---a harness used to interface with the FmX.
Asking $200 OBO for each kit. Specify whether you want "the 500 kit" or "the FmX kit". Because these items are discontinued, they are being sold "as is, no returns". If you want photos of the lightbar powered up, let us know.
EDIT: There is a hardware package meant for the FmX kit that found its way into the photo of the 500 kit, so that has been relocated. Also, in order to use the RJ11 extension wire for the 500 kit, an RJ11 gender changer is required; this will be provided at no additional cost.