I work for a R&D surgical device I have access to CNC lathes, mill, plunge EDm and wire edms.
It wont cost more than $5 if you design it with ease of mfg in quantity. I suggest you do not use EDM (cost) Punch it out of stainless and etch the logo or punch the Z logo on. and if you want zinc or other coatings in batch will cost pennies