I reside in the US but have found great heaters and thermistors/thermocouples on 3dprintingcanada.com (shipping isn't terrible)
Otherwise my current setup (Hercules mod) is mostly from Amazon:
BIQU Dragonfly Hotend https://www.amazon.com/dp/B08M94C4XG
BMGv2 Extruder (TriangleLabs) https://www.amazon.com/dp/B08KP189KN
Winsinn 50W heater cartridge https://www.amazon.com/dp/B07MP7XLTC
Polis3D T-K500 thermocouple https://www.amazon.com/dp/B08F33WDDM