what boiler to i use to replace the potterton flamingo 40 boiler?

my house has a wall mounted potterton flamingo 40 boiler, it's at least 15 years old and has now been condemned. i can't afford to replace my pipes, radiators or to take out my water tank so i need a boiler that works with what i've got. i know the potterton flamingo 40 is no longer manufactured, what is the closet boiler to it that will work with my appliances. i've already asked the question but forgot to include my email address, please help me.pls contact me at emmaduffy19@aol.com