Macgyver brainstorm! Bluetooth connection booster

Im an auto technician, and we have had an issue with our scan tools and Bluetooth connection with the vehicle. It's proprietary software and this is the only option, is there any way to "boost" the signal? There are several wireless routers in the shop and numerous devices on the wifi. I can't find a device like a wifi extender, is it possible to run the Bluetooth signal through the wifi signal booster? I'm also open to any ideas. I've thought about a dish on the vehicle interface device. But I can't change any hardware, software or connection method.