What we need is bricks with curve.
Mmm Try And Make a vote on If its a good idea or a Phailing idea
Maybe I will do it in the future.
The last thing we need is more bricks that are just DTS files using props/jvs content.
Most user made prop bricks have fail collision.Ephilates made the arches so that you can build in the arch part. You should ask him about making it.