Well, you saw the results I got from doing this for WWPD. This is how I rigged the camera.
P1070699_2 by
br1078phot, on Flickr
Using a plastic jar lid, trace a circle a little smaller than the outer diameter of the lens mounting flange on a piece of heavy duty aluminum foil.
P1070700_2 by
br1078phot, on Flickr
Mounting diameter marked.
P1070701_2 by
br1078phot, on Flickr
Use some clear packing tape to stiffen the foil.
P1070702_2 by
br1078phot, on Flickr
I used a dental pick to score the crosshairs for the center of the foil, then cut it out with some scissors.
P1070704_2 by
br1078phot, on Flickr
I don't know what size this needle is, just that it was smaller than the push-pin I originally used. I pushed just enough of the tip through the foil for a small hole.
P1070703_2 by
br1078phot, on Flickr
I see the the light!
P1070705_2 by
br1078phot, on Flickr
Next, trace a circle larger in diameter than the lens mounting flange in some painters tape, which has been applied to a plastic battery container (or whatever you have that you don't mind scoring). Gaffers tape would be excellent for this.
P1070706_2 by
br1078phot, on Flickr
Then trace a circle smaller than the diameter of the lens mount on the tape. Smaller than this size would be better.
P1070707_2 by
br1078phot, on Flickr
Here we have the mounting tape ready to be cut with an Exacto blade.
P1070708_2 by
br1078phot, on Flickr
And the mounting tape is now ready to be mated to the foil.
P1070717_2 by
br1078phot, on Flickr
Here is the finished product. Later on, I plan on making this out of some stiffer material, with a smaller foil piece in the center. The 35mm viewfinder is an added touch, as this arrangement is somewhat wide angle.
P1070718_2 by
br1078phot, on Flickr
I present to you...The PHArgus!
PF