Just looking if it’s just best to buy a new one during my vacation to France in April. I do like the vintage canvas because it’s thicker.
You can find a mono Keepall 50 for around $600-700 in good usable condition. Unless you get a vintage bags that needs an overhaul for under $50, it's not going to be worth it (resale wise). You will spend about $800 on repair for what you mentioned you wanted replaced.