Re:
Hi Ugo,
You’ll want to narrow down the field based on steerer diameter (and length) whether this is threaded, threadless, v-brake or cantilever (probably not discs) and the axel-crown measurement, which might be guessed from the travel of the suspension fork.
If for 1” threaded steerer, 26” wheel etc then new options might be limited. You should find plenty good secondhand though
Kona Project 2, especially the triple butted, had a good reputation, we’re used for many years including by custom frame builders.
Mat