The Gotoh "Buzz bridge" is a commercially-available product, but it looks as though the mounting holes don't correspond to any other bridge. I spent a while figuring out how to do this on steel guitars, and it's really pretty easy. If yo have a lapsteel guitar or possibly even a slide guitar that's set up high enough to use as a lap steel:
Line up your slide on a single unwound string going in exactly the same direction as the string, PARALLEL, not across - then gradually ease the angle of the slide further back towards a forward slant position while picking continuously. At some point around 20 degrees off of parallel the string will be sounding, but still buzzing against the slide. Learn to control it.
There's another, really really simple way to get close electronically. You need a delay effect that lets you program specific time intervals, and it has to go down to zero. Set the delay level at a good high volume, 70 to 100 (if 100 is at unity gain). Then set the number of repeats really high too, 90, 95 but NOT 100 where it's own feedback takes over. And then set the repeat time at somewhere between 3 to 7 milliseconds. And then gradually ease up the volume as you're picking. You will have to adjust the parameters to suit your own needs, especially the delay time & number of repeats, but those values are right in there. This is exactly what the E-H "Ravish" pedal is doing.