Are you attracted to this coat because of the zips, patches and pins or have you looked past these embellishments and found something that resonates with you? There are most certainly numerous other options out there for pea coats from the traditional to more fashion forward. IMHO keep looking.
From a functional perspective, you won't find very many technical material peacoats and especially with Diaplex. Diaplex is like a micro-climate material, when your ambient temperature is cool, the jackets of the pore constrict to retain heat, when you are warm, they open up to release heat. On top of that they are usually breathable and waterproof.