I had a hard time finding a substitute long pole that wes heavy enough. I bought mine from the VT museum in Dayton, Ohio. It was somewhere in the neighborhood of $120 after shipping.
Try these forearm exercises while you're waiting for the pole to get there:
1) wrap a towel around a pullup bar (making the bar thicker)and do your pullups.
2) hang onto the ends of the towel and do your pullups
3) take the weight off one end of a dumbell, making "a hammer" Then, with your arms at your side, holding onto the handle end, with the weight in front of you, raise and lower the weight with wrist motion only.
4) Do the same thing with the weight facing behind you.
5) place your forearm on a bench, holding onto the handle with the palm facing upwards. Leave your forearm on the bench and turn the palm downward, taking the weight in an arcing motion to the other side. MAKE SURE NOT TO USE TOO HEAVY A WEIGHT ON THIS
5)And the last is to take a dowell rod and hang a 10# weight from it to where it just barely touches the ground with your arms held straight out in front. With wrist action only, roll the weight up and down.
By the time your long pole comes in, you'll be set to really get some use out of it.