im looking for flat aluminum mirrored disc that is Round that is about 3/4”, so would any of u no where i can get some 
up………………….
you could always buy a mirror and bring it to someone who does custom windows to cut it i am sure
Maybe your dentist or a medical supply store?
Look for mosaic parts
In Germany, I would be able to buy a mirror in that size (3/4”= 19mm - I could buy 20mm):
http://www.ebay.com/itm/380551984097
i for got to add to the first post that it needs to be aluminum and to have a mirror finish to it
when I was fooling around with lasers for my daughter’s birthday party dance, I went to hobby lobby or michaels
craft store and bought a bag of coin sized mirrors. but they were not aluminum- they were glass
i think i found what i need but it involves finding a person that has a cnc machine to cut them to size 