Hi @beanman56
Here’s a US link for some 2.5mm washers
[link|https://www.ebay.com/itm/112485217622?_ul=GB|https://www.ebay.com/itm/112485217622?_ul=GB|new_window=true]
UK link
https://www.ebay.co.uk/itm/383536842495?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=g4gbkfnlsh6&sssrc=2349624&ssuid=0ACG7idPSQ6&var=&widget_ver=artemis&media=COPY
I don’t know where you are in the world but these are the 2 most common place I know of
If you live out side of these place let me know and il find you some one from a different place
Hopefully this helps
Thanks:-)