Are you supplying the TV? If so look at the 9 series Sonys that feature the acoustic surface and can be used as a centre channel speaker hooked up to an AVR.
Is it reference quality? No. Will it solve your problem and be suitable for this application? Yes.
Even if the TV is existing, you may be able to upsell them on this.
What do you mean you wanted it on the other wall - couldn't you have mentioned this when we prewired?