Not sure if one is available or not for the ender 3, but I have a removable flexible print surface for my prusa and love it to bits. If there was one available I would jump on it in a second for the ender.
The ender 3 doesnt have the magnetic bed? I guess the pro version eh..
I wonder if you couldnt glue the magnetic bed onto the glass bed, that way you can simply lift up the corner of the bed allowing you to easily peal off your model.
See its totally worth it
I am honestly surprised Creatlity hasn't come up with a "clone" and included it with the printer. Or even a clone of the Prusa one.