[LFS] DC-DC Boost Converter 3.3-4.2vin, 6vout, 300mA

[Mr.B]

Background:
I have a small project in mind that will be LiPo battery powered.
It will have an MCU, DS18B20 temperature sensor, LCD display, couple of buttons, LiPo charge controller and an air pump.

Problem:
I have been unsuccessful in finding a DC-DC boost converter module (PCB mount) that meets the required specs to power the air pump. I have searched the usual Mouser, DigiKey, muRata website, etc.

Required spec:
DC-DC Boost Converter
Raw LiPo input voltage – 3.0v to 4.2v (Although the MCU will be running off 3.3v, so that is the realistic minimum for the boost converter.)
300mA output current. The pump spec says 250mA, but is the spec trustworthy?
Through hole or SMD, it does not matter.
Does not need to be isolated.
Preferred purchase from a reputable supplier.

Pump Link (apologies for the ridiculous length):
https://www.aliexpress.com/item/DC-3V-6V-5V-370-Motor-Small-Monitor-Breast-Pump-Micro-Mini-Air-Pump-Vacuum-Pump/32814109863.html?spm=2114.search0104.3.49.44f33a34oXOh8I&ws_ab_test=searchweb0_0,searchweb201602_5_10152_10065_10151_10344_10068_5722815_10342_10547_10343_10340_10341_10548_5722915_10698_10697_5722615_10696_10084_10083_10618_10307_5722715_5711215_10059_5723015_10534_308_100031_10103_441_10624_10623_10622_5711315_5722515_10621_10620,searchweb201603_15,ppcSwitch_2&algo_expid=4d954d57-613d-4fe8-aef0-86731f313cbd-7&algo_pvid=4d954d57-613d-4fe8-aef0-86731f313cbd&transAbTest=ae803_1&priceBeautifyAB=0

Purpose of the pump:
The temperature sensor is mounted in an 8mm ID tube that is 600mm long. The sensor is at the opposite end of the tube from the pump/electronics.
The sensor end of the tube is inserted into a pallet of packed cartons of fruit.
User presses the ‘go’ button. The pump starts sucking air from the centre of the pallet. After a time period, maybe 60 seconds, the temperature is measured. This will give a reasonable representation of the fruit temperature, without having to puncture the fruit with a penetrating probe.

Does anyone know of such a module off the top of their head?

If I cannot find such a module, I will have to rethink my battery technology.
I am trying to avoid 12v Gel Cell due to the weight.

Thanks in advance.