Dirt- Another idea. Most people think aluminum rods are a lot lighter than stel rods. In fact they are real close. You might weight the rod (total/big end/small end) and buy a steel rod to get balanced to your bob weight.
Manley Super 70 SBC 6.0 LJ rod weighs 580 grams
Eagle SIR I beam 6.0 bushed LJ rod weights 590 grams
While the SIR rod may be too weak for your application, it's just an example of what is out there.
Dave