I don;t know if we had the same thing A J Couch that was in 6 peices -- 2 backs and 2 bottoms and 2 cushions. We though that it would be a good idea WRONG. Every time you sat on it, the pieces would slide apart. Finally replaced the J couch with 2 rocker recliners -- much better.
As for slip covers, a throw over the couch may be the cheapest and best solution.
Bob and Marlene
2008 COLORADO 28RK 5er
2006 GMC 2500HD Crew 4X4 SRW Duramax / Alison 6spd
Reese round tube slider with 15000lb 4way tilt
Podigy brake control
Don't Buy New -- Reuse and Recycle DRIVE a HOT ROD
1946 Chev Fleetline Resto mod