I do have a power supply here for my other radio stuff. Two of them actually. I think I'm good on that. I just wanted an AC option for out and about. Looks like the 4103 may be the way to go.
If your interest is being "out and about", you might want to consider building something. I don't have a FT-817, but a friend of mine does. He is not very good at electronics, but he wanted something to let him use his FT-817 while hiking or off-roading. So I made a pair of battery boxes and a solar charger.
One battery box contained the charge controller and a bank of AAA NiMH rechargable batteries. I used AAA due to space constraints. The other box contained two AA NiMH rechargable battery banks. The switching was set up so that the FT-817 could run off of one battery bank while a different one was charging from the solar collector. A wall wart could also be substituted for the solar collector.
I used a charge controller from Cirkits (
CirKits SCC3 Solar Charge Controller Kit). The boxes were black anodized aluminum project boxes (4-1/4" x 6") and the rest of the parts came from radio shack.
The FT-817 is a great rig. I used my friends rig for a while while I was building a PSK31 interface. PSK31 works great with just 1 watt. CW works good as well but don't expect too much on SSB. It works, but it is difficult to scare up a contact. Small portable amplifiers are available in kit for to help this out. I built a 80 watt linear for my friend that worked great. You may not want to use a linear while you are out and about, but it helps for home use.
Martin - K7MEM