The Disney Elite Series Boba Fett with the cape showed up in stock for $27 on the official Disney Store website. Here's a short link, which won't work indefinitely: http://bit.ly/2cjwZ1A
The last time this appeared at Disney Store was way back on April 5, 2016 -- the day celebrating the disc release of "The Force Awakens," when the cape'd version became available in the United States.
Prior to the cape, there was the non-cape version, released on December 2015.
Happy hunting!