If the core is foam, talk to a local upholsterer who can cut and pad new cushion cores for you. He/she will likely use a better foam than original.

If the core is simply a muslin cover stuffed with fiberfill only, you or an upholsterer can open up the muslin and stuff in some more fiberfill. Again, an upholsterer or upholstery supply house should be able to get better quality stuff that has more resilience than your OEM apparently did.

If you want to DIY, there are places you can order from and have it all shipped to you.

RE: Precedent Cushions needing replacement -Call Precedent they will replace them.

Precedent warranties it's cushions for 3 years. The fact that your retailer isn't around anymore doesn't matter.

Contact Precedent directly. I had to get mine replaced too and Precedent was very helpful. Here is their contact information:

PRECEDENT FURNITURE
1425 SMYRE FARM RD
NEWTON, NC 28658-9361
(828) 465-7552