Purchasing the holder alone rather than the entire kit each month

Another customer asked this question, and I'm not sure you understood:

I have used the Advanced Digital Ovulation Tests a number of months now. They are quite expensive to purchase, and my understanding is that the holder cannot be reused. But I never use all of the test sticks. It would be nice to be able to purchase a new holder alone so that I can use all the leftover test sticks from other kits rather than continuing to purchase a complete kit each month. But I seem to be unable to find any way to buy the holder alone. Is that possible? It would be a great service to your customers to have this option.