Hi Honey...

part of the healing is being able to talk about it. I know how much loosing Timmy has affected you. Im glad that you are able to share this with those here that understand... that they are not 'just fish'.. but our beloved pets with so much personality. Its a horrible death for sure.. and you did nothing less than you couldve done. You had no idea that your cats would stick its paw into the small opening in the back of the tank. And you have since closed up the back of your other Betta's tank...
I feel that you cannot replace your Timmy.. but that you can find it in your heart, to honor Timmy. And that way would be to rescue another poor Betta from a cup, the same way you rescued Timmy and gave him a loving home.
You are a good Betta mom... and you just went out and got more plants for Timmys tank, making his ten gal a wonderful home. You can make it a wonderful home for another poor lil Betta that is sitting in a teeny cup.. waiting for you to give and to get love back..
You are on vacation this week.. I hope that you do go and find your Betta that wants to come home with you then...
btw on another note, keep 'feeding' your tank with some fish food to keep that cycle going til you are ready to bring one home..

's.... luv, mom