Code Red Headsets has several new microphones compatible with these Motorola radio models:
MOTOTRBO radio XPR3000, XPR3300 and XRP3500 series and Tetra MTP3250 radio.
Code Red Headsets releases new microphones for Motorola XPR Turbo Radio

Investigator-M12
2-Wire microphone with a clear tube earpiece. Low profile microphone with clothing clip, and push to talk switch.
The 2-Wire design provides more options for running the cord down a sleeve or placement on a tactical vest.
Recruit-M12

Clear tube is replaceable and compatible with our semi-custom Ear Molds.
Perfect for hotels, casinos, security and special event staff.

Rugged shoulder speaker microphone with a large, easy to access talk button. A 3.5mm audio port for listen only earpieces is located on the head of the shoulder mic.
Choose from a great selection of earpieces that are compatible with our Signal 21 microphone;
Our Silent Jr 3.5 (clear tube), Crew Jr 3.5 (swivel hook), Guard Jr 3.5 (soft hook), and Shield Jr 3.5 (D-Ring).
LINKS
Code Red Headsets – CodeRedHeadsets.com