I happened to come across a Nikon SB-28 flash for $80, but did not buy it yet. It looks like that will go as wide as 20mm and will work fine in Auto mode on my non-TTL cameras. I'll goggle around a little more tonight on this flash and may stop by and pick it up tomorrow.
Turns out the SB-28 was gone from the photo shop and a SB-24 was now there at $90. I kind of had my mind set on the SB-28 as it can go wider, so I got one off ebay. The SB-28 has a pull-down diffuser that extends the range to 18mm coverage. The SB-28 has an external sensor, so it can be used on all my cameras.