CJam, 103 92 83 69 bytes
S" || "2*+"Ö5yË(γÀH"222b4b"/ \_"f=9/ri*~W$]-2S"\ /"2*+:Et1E(+W%tzN* [Try it online.][1]
[1]: http://cjam.aditsu.net/#code=S%22%20%7C%7C%20%222*%2B%22%C3%965y%C3%8B(%C3%8E%C2%B3%C3%80H%22222b4b%22%2F%20%5C_%22f%3D9%2Fri*~W%24%5D-2S%22%5C%20%20%2F%222*%2B%3AEt1E(%2BW%25tzN*&input=6