Tim Taylor lives. You think like me. Why spend 20 cents for 2 grommets, when I can buy a $30 remote control.
To the OP: You will probably find a kit of 200 different size grommets for about $10. The nice thing is you can go home and test out different grommets. Maybe you want the hole looser or tighter. Downside is you'll probably loose the kit before the next time you need a grommet, so you just spent $10 for 2 grommets.
So why would a company leave out a 10 cent grommet. If they manufacture 1 million units a year, that is a savings of $200,000 or 1.3 million Yuan.