I've had a look on eBay and can't find any 110v PSUs. Your best bet would probably be to get an inverter from RS or a local hardware store, and then you can use any 220v PSU.
Also, I've discovered that 1084s come in PAL and NTSC flavours, so you would need to get the correct one for your Amiga. The cheaper alternative would be to use a TV. The best, but probably most expensive option is to get a scandoubler and use a VGA monitor.
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moto