I assume you mean a strap to hold the TV securely while travelling?
I installed velcro straps in a previous TT and used plastic clips from
theclip.com. Took the velcro and clips to a shoe repair store to get the velcro stitched. You can screw into luan paneling anywhere you want with some small screws. There isn't much force involved holding the TV against a wall.
I've also seen RVs at RV shows with factory installed velcro straps for TVs. All they did was screw the velcro into a wall using a washer. Not all that elegant but does the job.
