How do I get this widget made (a small rectangular bit of 1.6mm mild steel)

[HankMcSpank]

As it transpires, since my initial post, I've now established that I probably need the part to be something like 430fr stainless (on account it has higher electrical resistivity, therefore less eddy currents - and eddy current heat seems to be more of a problem than I first realised - especially at higher frequencies) ....430fr also resists corrosion (which was something else that was troubling me)...so right now, I'm on another quest to find a 430fr supplier that won't want me to buy 0.5 tons as a minimum order! (& the early indications are that it's likely to end in a cul-de-sac, because 430fr seems to be mainly supplied in rod form ...& in large quantities - it's a wonder anything new gets to market made by the small guy!)

Thanks to all who contributed ...& Scott, I'll definitely be in touch when I need such work done.