Eighteen days after sending my original e-mail message I finally received a response from a Smith & Wesson customer care representative. She wanted me to send her my mailing address and serial number of the gun I wanted repaired so she could send me a shipping label addressed to Smith & Wesson.
This sort of surprised me since I included my mailing address in the original message, and Contender barrels don't have serial numbers. It's a good thing I went ahead and ordered a couple dovetail locks from another online source. They arrived and I'm back in business again.
Prior to it's acquisition by Smith & Wesson, T/C would have just sent me a new dovetail lock in the mail within a couple of days of my original message. Now, it appears you have to send firearms or components back to the S&W factory for repair.
I'm a long-time T/C supporter and own several of their blackpowder guns, Contenders and Encores. Since they are now incorporated into the Smith & Wesson family, it looks like more red tape is involved in customer service and product repair. There are some positives by growing larger, but as far as T/C is concerned, I wish they remained a smaller customer-oriented company selling good products with lifetime warranties.