Does anyone know where to buy one of those velcro fridge closers?

Question

To keep a fridge door closed that keeps popping open

Answer 1

All you need is the heavy duty, wide, self adhesive backed velcro.

More important however is WHY the door pops open.

No offense but I'll assume you've checked to see if the door closes completely without pressing against things in the refrig.? OR that perhaps the pivot point/hinge, is functioning properly; OR that the SEAL is intact; OR that the floor the refrig sits on is level; OR the refrig itself has been leveled to a point that allows closing the door also seals it shut?