As I am sure you are aware, 5000 is a tiny amount for stamping, that's probably why no quote interest. For 5000 tooling cost amortization would probably make up 95-percent of the part cost. Hell, I have seen almost that many made during set up on a high-speed.
What about Laser? Water-jet? At 0.010" thick they would cut those 5000 in about 3 minutes.
You may also want to add, "Nom" or "Typ" to the thickness as your tolerance spread equals the material thickness.
Generally, I will not give you the answer to your question, but I *will* guide you into discovering how to solve this yourself.