Replace radiator

Hello, We live in Almere Haven and would like to replace an old radiator in our child's bedroom with a new panel radiator. The current radiator is quite old, and the air bleed valve is broken. We have a gas central heating system. Could you please provide a quotation for removing the old radiator and installing a new one, including all necessary connections? We would also like to know if we can purchase the radiator ourselves and hire you for the installation only. I can share photos and measurements of the existing radiator if needed. Thank you in advance, and I look forward to hearing from you. Best regards, Gokhan