Can you describe what the field would look like from an electron?
In the nearest mass of opposite charges, or at infinity. It doesn't matter: superposition applies, as it always does in linear E&M. Meh, go look in your physics textbook for curves -- mentally replace E with H and D with B. It's not hard Mike :)
Same way you made one in the first place, of course!
Assuming a MM is an elementary particle of some sort, it would occur as the result of myriad interactions in a high energy collision. The most likely interaction producing it would be a high energy weak interaction. By parity, you'd be equally likely to find positive and negative charges, which would most likely be antiparticles (analogous to electrons and positrons, and as such, rather unstable around each other!).
The evidence would be very distinctive in a particle accelerator, because they would be accelerated by the field lines of the superconducting magnets used. Even if the particles aren't themselves visible (for instance, electrically neutral particles don't leave tracks in a bubble chamber), their likely decay products will.
Then in that case, I think the nature of an electric field prohibits the electron. The field lines pass through the source (e.g., a dipole such as a battery), and wrap around so they are continuous. There is no starting and ending point, just like electromagnetic fields. If you cannot have a definite stating and ending point, you cannot have positive or negative electric poles. If you cannot have separate poles, you cannot have an electron.
Have I made things clear yet? :)
Tim