This may not be much help at work, but something I've been looking into lately is 'sensory deprivation tanks'. It's a tank with salt water in it, you go in and float on the water with your ears submerged and the door closes to block out light. It sounds quite appealing having your senses 'muted' for an hour or two considering for most of us a normal day involves having our senses obliterated by what those not on the spectrum consider 'normal' input.

Sadly, there only appears to be one such place near where I live and it doesn't get very good reviews for cleanliness. Since I also have OCD with mild contamination issues, it's putting me off.