mine eats electrical cords.
which... i suppose is a little better than your situation cause i can spray everythign with bitter apple spray and not worry about it. clothing is a little difficult to spray.
they are (in my case anyway) likely to shift their OCD habits to other things. one day my cat decided i needed a bath. ive been getting baths several times a day for months now. when i dont take the time to get a regular bath he chews his fur off.
he still chews cords and eats my kids toys(wooden OR plastic!!) but its not as bad now.
i would try different fabrics and see if there is a fairly durable one that you can find for him to chew/suck on.
Chris- Husband, 04/30/77
Cailyn- Daughter, 07/05/99
Jeffrey- Son, 03/24/06
Alex- Son, 03/25/09
Mister- Black LabX, M, 08/06(?)
The Shadow Stalker- Gray Tux DSH, M, 04/04
The Mighty Hunter- Black Tux DSH, M, 04/04
Baby Girl- Tabby DMH, F, 12/03(?)
Frances- Tortie, DSH, F, 2007(?)