There's a search window in the upper right hand corner of the display where you type in your ZD-1. I just did and Rockauto doesn't show the ZD-1 that's why I mentioned that you could use the ZD-9 GPs withthe termination change.

PS:
I recommend bench testing each GP before installing them. I use my battery charger to power them up until they get red hot. You can use jumper cables and your battery if you don't have a 10 amp charger.