Shure RPW110 Dynamic Replacement Element for Shure PG58 RPW110
Amazon.com: Shure BLX24/PG58 Wireless Microphone System with BLX4 Receiver and BLX2 Handheld Transmitter with PG58 Mic Capsule for Lead and Backup Vocal Applications - H10 Band : Musical Instruments
Review: Shure's PG24/PG58 Hand-Held Wireless Mic - Singdaptive Blog
Shure BLX288/PG58 (542-572 MHz, Band H10) Dual handheld wireless microphone system at Crutchfield