Finally got around to trying this. My machines are in my basement, which never gets above room temperature. They are fairly close to where I watch tv, and I like having them on just for the ambience while I am watching or gaming, so the noise on my Deadpool and SW Premium were starting to bug me.
I did my SW Premium, following the instructions and using the parts in the original post. I didn't want to splice, I wanted it as reversible as possible, so I also bought the connector housing and crimp on connectors. I also bought both the 12.8 and 21 db fans so I could compare. My notes/findings:
1) The crimp on connectors are the right part #, they worked great. Anyone trying to do this who does not already have a crimp tool, get one, comes in useful for all types of pin repair stuff.
2) The 21 db fan is definitely quieter than the Stern. I didn't time it closely, but it did not seem to run any longer than the stock Stern fan when cooling down. I really wanted to use this one just to play it safe, but I felt the fan was still too noisy
3) The 12.8 db fan is nice. Can barely hear it while running. I can hear it come on but I have to be listening for it. It does take longer to cool down the power supply, runs for about 6 mins compared to 2.5 to 3 mins on Stern fan.
Big thanks to Vireland for posting the parts and everything. I bought extra housings and crimp connectors (because I usually screw up my crimping a couple of times), and two of each kind of fan, and with shipping only came to about $55 CDN, which is less than I usually have to pay on shipping alone for mods and parts, so pretty happy.
Maybe one day Stern will source fanless or quieter power supplies but until then I will just mod my Spike games with this, and will still be able to pop the original fan back in when I go to sell if someone is concerned.