I need my Pi!
Been a real problem for me as well. Been selling a Pi4-based product this year and board availability has tanked. Sure I can get one here or one there (max order quantity of 1), but that doesn't work out so well when I need 10 every month or two. I was able to find an alternative board. It will require some case changes but should actually simplify the build as this board has a selectable OTG USB port as well as Pi-compatible CSI and GPIO. Worst part will be getting the OS/Software to run! Will see how it works when the first board arrives soon!