It may sound crazy, but you can make a set. I bought Thompson rod and had a set made. It is hardened (50-53)on the outside and can be drilled on the inside. One of the reasons I went this direction was that 1) I get a thicker shaft like a Harland (gun barrel) 2) Correct diameter for my rockers. The needle bearing in my rockers are actually made for a .875 shaft, stock shafts are .873. 3) Cost, I have less than $100 in them. The rod is available at McMaster Carr and both shafts together were less than $50 delivered. It works out at least on the big block that there is a ready made rod the right length maybe an 1/8 short. So I guess this is an option if you have machine shop close by that you trust.