Vigouroux is set to join Swindon.
Power told the Swindon Advertiser: "He reminds me a little bit of Bruce Grobbelaar and you don't know what you are going to get with him.
"Sometimes, it might not be great but other times, he takes your breath away with things that he does, but he is someone who we have spoke to Liverpool before about.
"They said they wouldn't sell, but we're going to try and have another crack at him in the window.
"We're trying to crowbar the door open as we speak."