Ridetech sells this tool. Not really suggesting it, but seems like the basic setup wouldn't be too difficult to duplicate with a minimum of fabrication skills and some trial and error. The video helps.
Control Arm Bushing Removal and Installation Tool
Our Bushing Tool kit makes it easier for you to remove and replace the bushings in your GM Muscle car control arms. With this tool you can press out and install bushings with simple hand tools.
www.ridetech.com