My lamp is a desk top,the glass is not flat but has a curiture to it. Is 4.5 in in dia.

Sorry, I do not think we can help, we are not a shopping or parts locating website.

Best I can offer is for you to find a local lighting store to show them what you have and they may find a replacement for you.

Also, considering there are literally thousands of different types of glass globes, it is impossible to tell with out a pic or seeing it in person.