Fluffygrue, you could take cuttings at the end of the season if you wanted. Tomatoes are sometimes propagated from cuttings commercially. You would need to keep them indoors, say a bright windowsill, not too warm or they'll grow a lot and get too leggy. If you do have somewhere like that, you can also try sowing seeds in December/January so they'll get a good early start, but again, once germinated they don't want to be too warm until the natural light levels increase.