Newly acquired Olympus Pen E-PL2 digital does a good job for the money.
New K31 bolt video:
http://www.youtube.com/watch?v=eqNYMB-p5lM
Swiss Products K31 Left Hand Operating Rod Video:
http://www.youtube.com/watch?v=g0MUjytIcbQ
Not too bad except for saying safe position when it was actually fire position.
Might update the videos, when I get a chance.