Looking for a SPDT switch

[Townesw]

I am looking for a round rocker switch, SPDT, weatherproof, threaded mount, not lighted, blade terminals. I am not finding anything like this using my usual search methods. 
 

I have removed the shelf from the bathroom vanity and have installed a marine hatch in its place. I now must relocate the pump switch. The factory used what I think is a DPDT panel mount switch and held it in place with a wad of caulk. I want to mount the switch more securely.

Switch as mounted in the shower shelf

 

Switch removed from shower shelf 

 

Where I want to place a new switch

 

Wiring schematic showing switch I want to replace 

Thanks for your help 

Bill

[Snackchaser]

I get switches from DigiKey.  Use the more common DPDT like the original one.  Part number CW110-ND.  Haven't seen any with threads and nut, so be carful to drill the hole the correct size.  The problem is that the fiberglass is too thick for the switches to snap in properly.  Therefore some adhesive is needed.   Oh, be carful to keep track that the center wire goes back to center, the other two don't matter.

Good luck!  Geoff

Edited 23 minutes ago by Snackchaser