Of course it's not "authentic". Nine out of ten of Mugen parts on eBay are knock-offs or "replicas". Of course anybody could make this and say it's official Mugen, but what would possess somebody to think, "Hey, you know what a ricer would buy? I know! A Mugen-branded tissue box cover". There's still four days to bid on it. I would be too surprised if somebody bought it. Come on PO, you know you want it!
@ spin r g: I'm not selling anything, just pointing out a great deal.