We do go through this from time to time, from vendors in this industry that supply car building parts, and from some suppliers that we get components from for our products.
Timely delivery and accurate information is one of our main criteria for grading a supplier. Price is further down the list. May times we reject or even dismiss a supplier because they stumble on delivery.
Having said that, EVERY supplier [at least in my experience] will have a delivery problem at some point, even the rock solid most reliable ones.
I think you will see a huge rash of this coming up in the next 6 months. Things are fixin the get busy. We are already deep into building parts ahead in anticipation of a spring season that hasn't been seen in years. I hope we can keep up, I hope we don't run out of anything...and I hope I'm right about being busy