I am so sorry for you lost. I am also sorry for taking so long to post this. I know exactly how you feel. When I lost Shadow, it was losing my best freind. Shadow had been through so much with me; divorce, suicide of a good friend, marriage and more. When Shadow past away, I no longer had my freind that I confided in. So, you loosing Tubbus is like loosing your best freind. I remember when you lived in GB and Tubbus would not let me in the house unless I brought him french fries from McD's. He would attack me until he had his french fries. Tubbby also could be a big loveable lug. I struggled for a long time too deciding if I wanted another cat or not. I also was looking for another Shadow, knowing very well that I would never find one like her. Even Jim kept telling me that there is only one Shadow in the world and why would you want to replace her. Instead honor her with her memory. So I went out after 6 months and found a cat, Prowler that is nothing like Shadow. Ask T-bird, she will vouch for me on this one. Will you ever get over the lost of Tubby, no. Why would you. Tubby will be in your heart and the hearts of everyone that met him. The greiving process will lessen but I still am sereaching for Shadow and I still miss her even after 7 years she has been gone. Remember the moments you shared with Tubby and don't forget him ever.
Tubby-- Lucy and Shadow are waiting for you on the other side of Rainbow Bridge.