VGA To BNC Adapter?

We’re replacing one of our customers old Bosch DVRs with a new Hikvision TVI recorder. The old system had 100 feet of coax going between the old DVR and the customers TV so he could view it in his office. Rather than replacing the coaxial (he doesn’t want to pay for it). I am wondering if someone can make a recommendation for a VGA to BNC adapter. I know there’s a few available, but I’ve never had good luck with stuff like this.

We’re going to put the client software on his PC. He would really like it on his “big screen” like the old system currently is, there’s no computer close by or any available inputs other than the coaxial. He’s not interested in getting a new TV and understands picture quality will be low on the old tv.
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