stop ring for Aquatica A20 housing

Hello

I need to replace a stop-ring (c-clip) on one of the four top buttons (AF-WB) of my Aquatica A20 housing (for Canon 20D).
Any idea where I can get it?
I can buy a few for spares.

Thank you,

Ignati

Ignati, there is a C-Clips package available that has10x of each of the clips used in our housing, its product # is 19222 and is available through your local Aquatica dealer. (prefferrably one that support Wetpixel )

Thank you, Jean!

I also found another useful product - Aquatica 19223 - Tips for Buttons and Levers.

I will get both from Aquatica dealer.