Thanks for the thread link DADS50. I found a red plastic lid from a small plastic container I had sitting in my shed. I used metal snips to cut out a circle to make it a great replacement for the indicator. Best part, it was free.
I called the parts supplier and he grabbed some of the same decals off of the shelf there at the warehouse and discovered they were all missing the indicator hole. Once he talks to the manufacturer Monday, he'll call me back. Hopefully I'll get a new replacement.