My Apple II had a IIe power supply that was swapped in, when the original failed.   I replaced the IIe supply with one from a II plus that has much more the look and feel of the original.   I purchased an old plus off of eBay that had a power supply similar to the original and it was simple enough to make the swap.  I'm still on the lookout for an original II power supply, but this one is a fine stand in.  I noticed  one website highlighting an early Apple II, that that power supply has a toggle switch instead of a rocker switch, but I don't remember having a toggle switch on my machine.  Anyone have any thoughts on what switch was on power supplies for machines in the 2000-3000 serial number range?  The power supply on the bottom has the appearance of the original.  

Update 5/27/2007

At this point I'm pretty sure that my low serial number Apple probably had a A2M001 power supply.  I found a low serial number (<3000), II plus on ebay with some issues and a M2M001 power supply.  However one of the issues with the machines is a bad switch on the power supply.  I've just ordered a replacement switch, as the the original manufacturer is still in business still has a switch in their current lineup that appears to be a near exact replacement.  Once I get the switch in, I'll install it into the power supply and update this page.  Note that these early power supplies are held with screws and a couple of rivets.  In order to get the bad switch out, it is necessary to drill out the rivets.  Fortunately I have a pop rivet gun.  I will be able to restore the power supply to original condition with a couple of 1/8" rivets, once I recieve the new switch.