Nutrition support for 40 day adventure trek across France / Spain

I am working with a client, advising training and physical conditioning for a multi day, approximately 40 days, trek across Europe. They are a middle-aged male based in Australia. They need advice about nutrition to fuel the training and to get ready for the event. I am looking for an experience nutritionist to support the client. And understanding of ultra endurance event performance, fuelling with limited provision of supplies and hydration are important. The client appreciates a direct approach. Please contact me if you have experience of delivering similar work to discuss.