I have a ski box that was removed from my 182.  It will hold 2 pr of skis and some misc items.  It was fabricated and installed for me by Gary Sipes in Tulsa OK.  I do not use it, and would be willing to sell it if you're interested.  Gary told me that it should fit just about any Cessna fusalge.  His phone number is 918-298-8841.  He could build one for you.  Or, he could install mine in your aircraft.
I can send you some pics if you like.

Ron