We got ours at barbeque's Galore in Dallas... they have two locations in Houston:
Click here:
Barbeques Galore - Store Locator
I don't remember the specific one we got... but I do remember that they had a whole wall of different ones that can be turned on to help you choose.
There's different sets of logs depending on your needs. Some logs hold heat longer and other's are more for show. If you are using your fireplace as an alternative heat source... then get the better logs.
Also... pay just a bit extra for the more realistic logs and flames. You won't regret it.
If I had to do it all over again... I probably would have paid the extra $$ for the auto light. Just for convenience.
Bob