Welcome to the JOF!
A complete OE decal set is a tough quest. Most decals are sold in pairs for each side of the RV, with the exception of front-end graphics. You might have some luck finding suitable decals on Ebay, but Jayco more than likely won't have them for a 2008. A check with your dealer would confirm if they offered any for it anymore. A good place to check on is a local graphics business. They could make whatever you're looking for.
Every day's a learning experience, though sometimes not what we expected.
2012 Jay Flight 19RD
2016 Ford F150 XLT 2X4 SC 3.5L Eco Max Tow
2010 Tundra TRD DBL Cab (Traded)
2 new fluffy Corgis, Bayley and Stanley