well if you are not able to find the genuines too ..... loll
or even keep the genuine cd dvd case / package sticker somewhere .... or uses specific legal software to backup all activation numbers, like Os, Ms office and many others ...
things like this may happen again, now the banned op has to be careful, if a next time happens
even i had some problems, a ssd died at my job, office 365 with tons of cloud related features, even getting back on the network and getting my activation back, it was a nightmare to redo all the share-point accesses ... rebuilt onedrive ....