Hello,
I have developed a RFID reader for 125Khz range for EM4001 cards complete with antenna design and User Interface. (Both electronics hardware and software).
This is presently being used in a school for recording attendance of students.
Please revert if your end application is somewhat similar. Even RFID with 13.56Mhz can be developed and designed if its your requirement.
The quote can be negotiated based on detailed requirements. Present proposal is only tentative.
Regards,
Nasreen