Tail lights with side pointing LEDs used to be pretty common but they
seem to have disappeared.

Now that my new rack has a very good mount for a tail light I was
looking for something similar to the old CatEye TL=LD1100 which had six
rear facing LEDs and four side facing LEDs. Still on they web site at
http://www.cateye.com/en/products/detail/TL-LD1100/ but apparently
discontinued.

I tried ordering from Amazon and we'll see if the store really has them
since they quoted 14-21 days delivery.