Replacement suction cups/hanger for Cobalt Neotherm heater?

[tranceFusion]

One of the suction cups on my cobalt neotherm heater went MIA and the replacements on their site are out of stock. I'm wondering if anyone has found some that fit the bracket? (I have a few different types and none do). Or an alternative hanger for the heater?

 

[blaxsun]

Anything you can find that will fit will probably work. Ideally something designed for use in aquariums.