You can find a great selection of wall-mounted fireplaces at burleyfires.com: http://www.burleyfires.com/

There are various manufacturers that make direct vent gas units as well. Here's one example:

http://www.heatnglo.com/en/Products/Cosmo-SLR-Gas-Fireplace.aspx

Are you talking about the fireplace itself or the wall material around it?
(btw, that fireplace is not wall mounted, it is actually recessed into the wall)

Yes, I am primarily interested in the stone material. It goes beautifully with the gas fireplace, and makes it look less industrial.

Who makes this fireplace?

hmmm . . . I'm not sure whose fireplace this is, but you can check out a few different linear fireplaces here: http://pinterest.com/pyrotom/places-of-fire-linear/

I wonder if this one is the town & country 54"...

Hi aes13 - I love Ortal Fireplaces, but I doubt they'll be less of an investment than the more mass-produced fireplaces by the bigger manufacturers.

I don't think the fireplace in the photo above is a T&C because the fire looks too big to me and Town & Country uses stones in their two linear fireplaces to camouflage the burner and I don't see any stones in the one above. But that's just my opinion.

If you'd like to compare your choices, you can find a local fireplace expert at either the Hearth, Patio & BBQ Association website or the National Fireplace Institute website:

HPBA: http://www.hpba.org/retailer-locator

NFI: http://www.nficertified.org/pages_consumers/consumers-1.html

If you don't find anyone local, I'll be glad to help you . . .

any response on the stone?

What is the material surrounding the fireplace??