i have an Elec-Trak! It's an E-20 and i bought it from FVEAAer Ken Simmermon whom bought a number of them from the estate of a past FVEAAer.
i love it! i use it for plowing my driveway and towing heavy things around the yard. i have the mower deck too.. but i only have about 8 minutes of grass mowing left (rest is plants, trees, shrubs, gardens, and paths).
Here's a link to my EV album entry for it:
http://www.austinev.org/evalbum/771There is a very active hobbyist movement here:
http://www.elec-trak.org/