Overview
The PRT-21257 is an antenna made by SparkFun Electronics with 5 pins. - Antennas ROHS.
JLCPCB lists it (part C7030112).
Symbol
The library has no symbol for this part yet.
Footprint
The library has no footprint for this part yet.
Questions
Where is the PRT-21257 datasheet?
SparkFun Electronics publishes it: the Datasheet link on this page opens it.
Where can I order the PRT-21257?
JLCPCB lists it as part C7030112, with 0 in stock; the sellers' links on this page open their listings.