FWIW, I made my own counter weight using an old 16 gallon oil drum, bought a cross bar from TSC and bolted the drum to the crossbar. A friend was having an addition put on his house, so he filled the drum with cement when the foundation was poured. I predrilled the side of the drum near the top and put in a turnbuckle and attached it where the top link of the 3ph goes.
Not the prettiest setup, weighs about 300 lbs. and cost around $30.00