Lambda made (makes?) some very reliable power supplies.
I have a Kepco 12 V, 10 A supply that I must have purchased (used) in the the 1980's. At that age, it's a linear supply with a heavy transformer that vibrates waaay too much. Even if it's sitting on the floor, the 60 Hz vibration in the room in very noticeable, to the point where I can't leave it powered on for hours because it is just too fatiguing for me.
Aside from the noise, that supply is top notch. Kepco makes rugged stuff that holds up.