Hi Bob,
The centre drawers were an optional extra and if requested then no cushions were supplied. We were in the same position and lucky I was able to locate some with the exact same material for 2007 (second hand).
Your best bet is to go to a foam converter and get them cut to size and covered. My friend Steve who runs 'Interiors' Ltd actually supplied Fleetwood for the final years and he has all the specifications (or he did have). I don't think you will have much luck with a fabric match from Premier Furnishings so maybe Steve would make up something similar.
http://www.interiorsfoam.co.ukIf he no longer has the specs I am willing to let him measure mine, he's just down the road from me it's about time we got together again. I'm thinking of getting some over-covers made to protect the originals against paw prints.
P.S. Jackie's working on the attachment quota.