These things have been sitting in the drawer for years - maybe somebody can use them:
#1 - Not a flange, but a retaining ring (screws onto the back of the lensboard, not the front). Seems to be anodized aluminum. 1.256" (31.9mm) x 48 TPI. I'd expect this to fit a shutter, but it doesn't fit anything I've got laying around.
#2 - Painted aluminum flange. 1.148" (29.2mm) x 36 TPI.
#3 - Blackened brass flange. 1.491" (37.8mm) x 30 TPI.
#4 - Blackened brass flange. 1.307" (33.2mm) x 36 TPI
$20 apiece, shipping (1st Class Mail) included. These are small enough to fit into a regular envelope, and that's how I'll ship them, unless you want to pay for something more elaborate. Paypal's OK, but if I'm paying for the shipping, you get to pay the Paypal fees. There's a way to avoid the fees by using an instant transfer from your checking account (rather than using a credit card), but I don't happen to recall what you have to do to invoke it.
The flanges are pictured below, #1 on the left, #4 on the right.
Charley