You may consider the Traco Power voltage regulator (a drop-in replacement, no heatsink needed): https://it.farnell.com/tracopower/tsr-2-2450/convertitore-cc-cc-5v-2a/dp/2848984?cjevent=9f984bfcf18b11ed80387d410a18ba72&cjdata=MXxZfDB8WXww&CMP=AFC-CJ-ES-8989328&gross_price=true&source=...