Roof Insert Wood Bows for '36 3 Window Coupe

[hrs1948]

Can anyone help me out with dimensional info for the roof insert wood bows for a '36 3 window coupe? I have attached a very rough sketch of a typical bow showing the dimensions I am after. I am not sure if all 3 of the bows are different so I have indicated the required dimensions for bows 1 to 3 (1 being the front-most, 2 the middle, and 3 the rear-most). I am looking for the overall length (L), length of the end cutouts (K), and the height of the curve offset at the center of the bow (H). I also need the cross sectional width & height of the main bows (Section A-A ,a & b) and the end cutouts (Section B-B, a & c).

Yes, I realize these wood pieces are available from a number of sources, but I would like to make them myself if at all possible. I have some clear, straight grained hardwood that should work well. I am trying to build a decent car out of a stripped, badly beat up and rusty hulk. Any help you can provide will be greatly appreciated. Thank you in advance!