1983 rear cross sills Fleet-side

[lzhunt]

Have the bed off of a 1983 K10, long bed, fleet-side. Does anyone know where to find the cross sills for this application? Every site and company I have managed to find are all Step side. Needs to be 71.25 inches long x 3 inches tall x 1.6 inches wide(where it contacts the frame, not the edge that is welded)

[riverbanks]

Years ago,I couldn't find them either,had a fabrication shop make them,I went wider and hid the originals,also added a 1/2" in height and raised cab with steel spacers,cheap body lift