Hi there! It's great that you're considering a vertical radiator to maximize space in your bathroom. There are many brands and retailers that offer high-quality vertical radiators for bathrooms, so you're sure to find one that meets your needs. When it comes to retailers, you might want to try specialized radiator shops that have a wide selection of options, I would recommend Radiator Outlet These retailers have knowledgeable staff who can help guide you through the selection process and find a radiator that suits your specific requirements. Slimline radiators are a great option if you want to upgrade your bathroom!