Hello, I do my best to find headstones for requests and it always makes me sad if there isn't one. If this is the case, I will cross check the graves nearby on the Lancs OPC site to see if I have the correct location and take a photo of the plot with the plot number added to the image.
If you want to contact me to give an exact location after checking with the cemetery, I'll be happy to re-visit to take a picture.