I got from Steve Retherford. OK ,here is the one i am giving the dimentions from http://i33.photobucket.com/albums/d66/toucanman/zbay1221.jpg its a coleman 152 but i looked at 4 other original parchment shades and all had the same basic dimentions with a few dimples added to the 3 spider legs to hold a mica globe centered in place on the earlier ones . the photo is taken from the top so you can see how the spider leggs turn upwards so the shade rides a bit higher than the spider trying to hide it . there are no side supports just very stiff parchment with a tape of sorts applied and then wrapped onto the wire rings for this style . some are hole punched arround the edges and strapped on to the wire with a string of sorts . so to me this looks very do-able once the materials are obtained . i think these rings can just be purchased by themselves as i also looked into this at one time . top is 8 inches across or 26 inches around bottom is 13 inches across or 41 inches around side width of paper is 8 1/2 inches shade hight on level ground is 8 1/4 inches 8 = 203mm, 8.5 = 216mm, 13 = 330mm