Help finding historical data for velocity of money (M1 or M2) for any country except USA Can anyone point me to a data set of money velocity for at least 20 years back for any other country than the US?
If you're willing to expand your definition of money, then yes, and easily: You can get broad money measures (M2, M3 and M4) as a percent of nominal GDP ($\frac{M}{PY} \times  100%$) from the World Bank for several decades for many countries (mileage will vary depending on particular country).

Just divide by 100 and invert.  By the quantity theory of money,  $V = \frac{PY}{M}$, Bob's your uncle.  Note that this will underestimate V compared to values reported by e.g. the Federal Reserve, because M includes M3 and M4.