Here is a list of some solenoids valves that are suitable for us. Remember, there is no single part numbers, you pick the series then choose what you want. There are thousands of configurations.
First up is what I consider the closest thing to "best" solenoid. It's low watt, low heat, small form factor and the price is very competitive.
Bettatail found this little gem a bit before I did, he shared the deal with me but since I'm from the great white north, I don't sell. PM him for details.
SMC VDW 2.5W
CKD SV-FB 2.5W
A2A model 0.25W
- Credits goes to haru for the pictures.
Some other less suitable options.
These are basically the clippard mouse solenoids, 10/32 ports makes it a weak choice for multiple metering valves.
I will update with further solenoids, there is a bit more out there but they are bulky and less known.