We had a 2011 Jay Flight 26rls. I think we may have the same sink as in your unit if it is the 60/40 split. Here are the part numbers for the covers. I had these numbers on file.
51-2519-20-B Cover for large /left side $15
51-2519-21-B Cover for small/right side $10
Shipping cost was about $11 to Phoenix, AZ. You may want to give them a call and give them these numbers. Hope this helps.
Joe and Mary Anne
1 18 yr old DD
2014 Ram 2500 Diesel Laramie Mega Cab 4 X 4
2011 Jayco Jay Flight 26RLS-Sold
2014 Jayco Eagle 298 RLDS