Waterbox 20 return pump choices?

[Ogi]

Hello I'm just after some suggestions for return pump for my rear chamber of the waterbox 20, its a super tight fit!
I'm after something dc and something quiet, any suggestions would be really appreciated, thank you.

 

[Vinny Kreyling]

https://www.bldcpump.com/product/new-blue-series/
If that does not work then the Varios line from Coralvue might.

 

[Sgchick]

SICCE Syncra Silent 1.0. These are supposed to be pretty silent.