Email the dev,
When I published my own app I got the option to specifically choose what devices to include/exclude. I think he may have just gone a little overboard.
The other thing is this phone supports API version 10 or lower, so if he targeted a higher level API that's another reason why we wouldn't see it. If he simply excluded it, he may take off some of those restrictions for you. Part of the problem too is our phone isn't even listed on there yet which is kind of strange too.
My own app is made specifically for this phone, but I leave it open to anyone with any phone because there's a chance it may work for them also, I just put a warning to clearly let people know, and actually do have customers with different lg phones and even a tablet or two without complaints.