Recommendation for Tray-less external port-multiplier enclosure??

I was hoping that someone could provide a reference for a site that sells (or a company that makes) a 'tray-less' eSATA Serial ATA port-multiplier enclosure with 3, 4, or 5 bays?

I am essentially looking for an enclosure just like this one, except one that's tray-less and won't require a screwdriver to mount/unmount the drives from a hot-swappable tray every time I want to add/remove/change one...

This is something I have been searching for for a really long time without any success, so any recommendations would be greatly appreciated!

Thanks!