Honestly the Panaflo 120mm L1a isn't really all that quiet, alot of ppl end up running it at 7v. I had one a couple months back before i sold it off and i personaly wouldn't find it level of noise level acceptable but thats crazy ole me 😛 But its definatly a whole lot quieter then your tornado like sunon fan, 108cfm is nice but almost over doing it...if you were just to take a quiet fan and move it close to your hot spots would cool just as efficent.
For fan mounts just grab buy an bike tire innertube and line up your fan mounts with it, doulbe the layers if you wanted.