The RC-50 is a Loop Station, actually.
The RCE-10 is the Boss Microrack Series Chorus Ensemble, and the Boss NS-50 is the Pro Series Noise Suppressor. Both are half-rack sized.
http://www.bossarea.com/
I'm not a big fan of Boss, but that site rocks for researching old Boss gear!
You could always line the bottom of a rack shelf with velcro and use pedals that way, if you want them off the floor.