Commodore 64 Power Supply

I'm sure most everyone who has ever used a C64 is aware of just how phenomenally bad the Commodore power supply is. I have only one C64, but both of my spare Commodore power supplies have now failed, taking a few 4164 RAM chips with them (thankfully, I have replacements!). Does anyone know of a commercially available replacement power supply, before I go off and build one? A linear supply would be trivial to design, but I've never done a switching power supply, which I suppose would be greatly preferable. The trick with the C64 is that it requires both 9V AC and +5V DC. (I've considered frankensteining together 9V AC and +5V DC wall-wart adapters onto the same DIN-7 cable, but it just feels so very very wrong). I'd love to hear from other Commie fans who've solved the power problem. -Seth