There's a mc28 on ebay USA right now that is missing it's keycard. What would all need to be replaced to get a new matching keycard for it? Does the entire clock assembly with matching card need to be purchased, or is it possible to get a keycard to match the existing clock assembly?

Is there any good source for the parts that would be needed, and roughly how much $ should one expect to spend?

Just looking for pricing estimates for stock cards, not HRC

thx!
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n00b