Had BG round on the yearly boiler service and they have condemned it due to two rubber flue bits perishing. The boiler is a 12 year old Keston Qudos 28s the official part is obsolete but can be bought online for about £80 including delivery. Fitting would be extra. Now as it is old do you think I should just replace the whole boiler for a new one as a straight swap? My reasoning is its getting old and more bits will break etc.