High Quaility soft releases can be found at 'Match Technical'
http://www.matchtechnical.com/Pages/Beep.aspx
Tim Isaac is the engineer who designs/sells the soft releases, thumbs up, coding kit, and E-Clypse Mag 1.25 and 0.85. His products can also be found at Pop Flash, a vendor sponsor of the RFF site.
He is a rangefinder enthusiast and have had the pleasure to meet him at Seattle Leica User Group (SLUG) gatherings here in Seattle.
Not affiliated with Tim or his company, just a satisfied customer.