From the two pics posted, it looks like a standard hex wrench with a center-drilled hole to let it slip over the tamper-resisting post in the center of the bolt.
If you can't find one online or from an SME dealer, worst case would be to DIY. You'd need a drill press with work clamp and a very hard bit. Any machine shop could do it in about 2 minutes, including the metal shop in the local high school/trade school. Please wear eye protection!
But really, they should be readily available...
If you can't find one online or from an SME dealer, worst case would be to DIY. You'd need a drill press with work clamp and a very hard bit. Any machine shop could do it in about 2 minutes, including the metal shop in the local high school/trade school. Please wear eye protection!
But really, they should be readily available...