Stephen,my copy usually arrives anywhere from the Thursday to Saturday following issue date. Occasionally,though not very often,it can be as late as the following Tuesday.
If you miss an issue you can call the office,talk to a real live person,(no automated "Press 1 for English" nonsense) and they will send a replacement copy at no charge. I hope you can resolve your problem with this,because a week without NSSN is just seven days!