RE: Kadet Mark 2 Wing Ribs
The K-Mk2's general rib profile differs only in the width of spar notch and tiny LE/TE shortening to account for any LE/TE/spar doublers. The wing is flat bottom, constant chord and thickness out to the wing tips. With a sheeted and cap stripped wing of this type, the profile of all the ribs will wind up being very similar.
If you have one rib, you pretty much have what it takes to generate something workable from.
Consider recutting any ply in your kit if its fairly old. A K-Mk2 I built recently was early 80's vintage and the plywood was de-laminating in spots. I recut all the ply parts from fresh stock.