I don’t know if I can help you fix it but I’ll give you what I know.
It’s using a MP3429 Boost ic, datasheet here. https://www.monolithicpower.com/pub/media/document/MP3429_r1.0.pdf
I don’t think changing the sense resistor will fix it but it’s worth a shot to try.
More than likely it’s the MP3429 that has blown or could be a fet or a opamp if it even uses one. I can’t see all the components.
This driver loneoceans created (The GXB172) was based off the MP3429 here. [ GXB172 - 50W Single Cell 17mm Boost Driver! ]
Here in the states I use Arrow for my electronic needs. Cheap with free overnight shipping. Other members have reported them shipping outside the United States but I cannot comment any more than that about international shipping. Might be worth a try though.
https://www.arrow.com/en/products/search?q=0603%20resistor&prodLine=Resistor%20Fixed%20Single-Surface%20Mount&promoGroupLevel=pl&filters=Resistance+Value:30m;In+Stock:Yes;
You can also use code NEW19 for new customers gives 10% off.