Not sure how long these will stay valid, but apparently my nl_office_professional_plus_2010_with_sp1_x86_x64_dvd_731121.iso was damaged (I forgot to check the hash) but I could download a fresh one from [WayBack] Download Earlier Versions of Office.
If you cannot find it by product key (I also tried it with a Visio one: worked fine too), then you can use [WayBack] Office 2010 direct link, X16-32250.exe, X16-32213.exe which are archived here:
–jeroen
via: [WayBack] Lost Office 2010 or 2013 CD/DVD? Legally Download Office From Microsoft