My Flashy board arrived, so I have tried that with the oscilloscope. I bought the cheapest Flashy board that has a single ADC channel, runs at 60Mhz, and has the fewest optional features (such as extra potentiometers, and period output). It cost $35 (plus UK VAT and custom charges). There are 100Mhz and 133Mhz variants available.
I created a single Pmod for it, that just uses the 8 AD wires, to get the 8-bit sample. I put a 3-pin header on it in case I wanted to use the other signals (Clock input, Period Output, DAC Vpos and Vrange control).
It runs off 3,3v and does not have the power problems that the AN108 had. It looks as if it has some teething problems, but I can experiment with it without the device crashing due to power problems.