Windows installation discs (Lozells B21)

Hi guys as part of my build a pc project I now need any/all versions of windows installation discs. The older hardware can't run all operating systems so need as many variants as possible to ensure the machines are optimised for use. Please dig around for your old dvd media installation discs that probably have never been used since purchase. And HMU if you can help - thanks for reading I can collect to suit most days/times.