Do post a picture, but also, call Winnebago. Might have to be Monday, but Winnebago is VERY good about parts support for their motorized units. I have zero doubt they can give you a part number and probably a supplier.
They're good on-line with parts catalog and diagrams too, so take a look
hereWinnie dealers also have a big paper catalog collection...
If God's Your Co-Pilot Move Over, jd
2003 Jayco Escapade 31A on 2002 Ford E450 V10 4R100 218" WB