2001 bed supports

[mike goode]

hi/new to forum/was wondering if anyone knows the dimensions of the bed floor supports on a 2001 f350 8ft bed 7.3 liter/as they are not available unless you buy the complete floor/am planning on using 1/8 th tubing but the 4 center ones(not counting the two end ones)appear to be diff heights because of frame height/any help is appreciated in advance

 

[Blue Goose]

I believe they are an available part through Ford....