There's also this one, with a bigger button and heart shaped! https://www.amazon.com/dp/B00C5SGHW0/ref=cm_sw_r_cp_apa_i_y8GgFbD48YRNW
It looks like you can do the same with "voice record buttons" like easy buttons too for a little cheaper https://www.amazon.com/dp/B00HT5HBMO/ref=cm_sw_r_cp_apa_i_R.GgFbVZHD1GG