1993 Jeep Wrangler windshield molding

My husband recently replaced a rusted windshield frame on his wrangler. The problem now is to find the correct tool to reinstall the rubber molding(which he was able to save ) which goes on the exterior of vehicle around the windshield. Any ideas as to what to use or where to find such a tool? He has been able to find tools for removing the molding but none so far to install the molding back onto the windshield frame. Thanks for any help!:smile: