WTB: mirrors, difraction grating

i cant seem to find any small mirrors or 'cheap' diffraction gratings. does anybody have some that wouldnt be to expensive.
i want mirrors around 2cm in diametre.
so, do you have them you could sell me or recomend a cheap place.

and, i can find electric motors but are there any great places for them too?
thanks dudes...

Here's a great little tutorial on how to make your own surface mirrors as well as a home-made spirograph.

thats realy awesome (im gonna build it) but the cheapest diffraction grating i can find is this...
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=130251473924&ssPageName=ADME:X:RTQ:US:1123
i was wandering if you could get an A4 sheet anywhere...

Hi Caleb:

      Try reading this thread.        http://www.laserpointerforums.com/forums/YaBB.pl?num=1219874013  

 In it I refer to a 3 mirror spiro. I made it with the $40 PCB with parts mentioned in the thread by Bionic-Badger. I used the motors and mirrors that I referred to in that thread. You can also buy his mirrors for $5 more. Then you just need the motors, and a laser, and an enclosure.

       It is a lot of fun building your own. You have to solder though.

        Good luck !!


         Docjohn  

I have 2 difraction gratings available for sale.  2" x 3", 1000 lines per mm $10 for both shipped or $5 for one.