I bought a 3D domed Lotus mini badge (18mm) from Divine Handicraft - only £3. Fits perfectly over the existing Lotus key logo if a little raised but did the job!
Hej! This sounds similar to mine when the steering pump leak was identified at first service. Unfortunately the replacement pumps were on back order so the service guys said it would be ok to run the car in the meantime until the part arrived. I ran it for some weeks and the pump became noisier...