The camera manual hints that the AF200S is the intended mate for the MV1 and should be pretty much "plug and play" once one figures out the amazingly complex rear panel on the flash.
The manual is available for free download:
Pentax Manuals | Accessories (PDF password = "Pentax")
If you don't already have one, the camera manual is also available:
Pentax Manuals | Manual Focus (PDF password = "Pentax")
As noted above, there are a plethora of other options that will work with your camera, the only restriction being that they be hot shoe capable.
Steve