Need to adjust the rear shock on my 2014 Classic. Ordered the spanner wrench from Polaris approx. 6 months ago, still no wrench. Now the dealership says they can't even find the part number listed anymore. I know there are other tools that can be used. I've tried large crescent wrenches, Stilson wrenches; nothing works. I don't want to use a hammer and chisel. Any suggestions...?