As i just posted, in this case, all you have to do is paste the part numbe rinto octopart and you would discover there are 5 no-questions-asked distributors that will sell you it without any issue.

Standard ones, like distrelec, mouser, TME, etc.

This is not hard

I guess I'm fortunate enough to have never had any issues with the local yokels and haven't run into anybody with any distributor horror stories. Save Keyence, of course, but at least their salespeople are so desperate for sales that the salesman you have at any given time will usually let you walk all over them. AB's licensing entitlement processes have always given me more grief than distributors. If it's any slight consolation, there are at least a few places in the world that don't have too bad.

Use the Siemens configuration tool, it verifies your selections and then gives you a BOM to order from.

You seem to speaking from the place of someone who actually hasn't done this before.