Rhino Bytes LLC is gone, but the URL lingers on.
Perhaps you're looking for the home page of The Haze, the 100th FBG. Here's a link:
100th Fighter/Bomber Group
If you're looking for EMail Assist, try CompuServe, you can probably find a copy there. However, the program is old, unsupported in any way, and I have no idea whether it works with whatever software CompuServe is currently using.
If perchance you are interested in purchasing this domain name, send me an email by clicking this link.