I bought a Mean Well NES-350-36 [actually 36V 9.7A] from Parts Express. Costs a little more through them, but I needed a few other things as well, and wanted to be able to easily return it if It doesn't work. According to one review it works best adjusted down to 32V. Comes with a power cord which, strangely, doesn't have a ground leg. PE also sells another similar unit for $20, but looks like you'd probably need to replace the original fan as it's apparently very loud.