Pololu - 3.3V, 2.5A Step-Up/Step-Down Voltage Regulator S13V25F3
BREADBOARD 3.3V/5V POWER SUPPLY MODULE - Whadda
Inland Breadboard 5V/3V Power Supply Module - Micro Center
Amazon.com: JBtek Breadboard Power Supply Module 3.3V/5V for Arduino Board Solderless Breadboard : Electronics
AK-USBSUPPLY-C 3.3V and 5V Power Supply from USB-C | Artekit Labs
Ac 110v 220v To Dc 3.3v 5v 9v 12v 15v 24v Switching Power Supply Board Isolated Switch Step Down Module - Switching Power Supply - AliExpress
In stock tiny AC Switchmode 12 watt regulated power supply, with 3.3 volt 3 amp DC output, 3.3 volt AC wall mount adapter.
Breadboard Power Supply V2 - 5V/3.3V
Amazon.com: HiLetgo 5pcs 3.3V 5V Power Supply Module for MB102 102 Prototype Breadboard DC 6.5-12V or USB Power Supply Module : Electronics
Amazon.com: ALAMSCN 3.3V 5V MB102 Solderless Breadboard Power Supply Module with 9V Battery Clip Power Cable 2.1x 5.5mm Male DC Jack Plug for Arduino (Pack of 3) : Electronics
Breadboard Power Supply 3.3V & 5V
PSA-45-033 60W 3.3V 10A AC-DC Switching Power Supply Phihong®