Ezlife,
OUCH! I tried and tried to come up with something, and I ended up buying 3 suitcase weights (50 lbs ea.) and then wrapped an old section of chain with 1" links around them. If you can weld, you should be able to make a bracket to hold some steel or lead weights that can bolt to the front. I also thought about trying to do something with a 2" receiver hitch on the front. Maybe adding some weight on a male end (maybe even a bumper hitch cargo holder) to slip in the receiver hitch mounted to the frame on the front of the tractor. But alas, I don't weld and it just got too complicated for me, so I went the more expensive, but easier, route.
Teach