American made RPZ?

I just finished up a job I started last year. The last phase included me installing some RPZ's. I was looking at my proposal and it stated all material will be American made. The architect had that in the prints, and I agreed to it. I installed a bunch of ball valves in the ceiling, last year and an electrical w.h. I found US ball valves and the heater was US. In the meantime, I ordered the RPZ's and installed them today. They were made in China, and cost about 1500 for all 3, so replacing them will kill me. Am I screwed? I can't find any US made ones out there, so I might be o.k.