Yes, here:
https://www.nestlenutritionstore.com/celltrienttm-cellular-protect-capsules.html
You can make it having a 600 mg NAC capsule and a 1/4 teaspoon of glycine powder or a 600 mg capsule of glycine.
There seems to be at least 3 Nestle products with the Celltrient name: Protect, Energy and Strength. One is a NAD product, one(this) is a glycine/NAC product(not available on Amazon because of NAC) and one is a Urolithin A product. The studies I see(and have been posted here in the last few days) seem to suggest all three are important. In other words, it would be a 3 pill regime whether using Nestle or a health/vitamin shop.
https://www.nestlehealthscience.com/newsroom/press-releases/celltrient
I see that NOW has (pharmaceutical grade) 1,000 mg glycine caps.
Wondering if that would be too much.