Mortgage lifter is different than the mortgage breaker. Unfortunately I cannot find these seeds or plants.
I am checking into this with some friends on my favorite tomato board. So far, the experts weighing in are saying that these are both the exact same tomato that had its name changed somewhere along the way. We have posed a question in the Seed Savers Exchange organization and I will report out what we find there. Seed savers Exchange is a great place to shop and you can often ask for things that may not be listed as there a 100's of growers that contribute ...
This kind of thing happens quite a lot, where someone saves seeds from something they grew, forgot the real name, or save the seeds from a unique fruit they grew from a tomato with a history like Mortgage Lifter and then re-name it something close and then distribute seeds under the new name. If they are different and I can get seeds I will start a few for you or save them and start them for next year, your call but I will let you know what I find out.
For now, here is a link to my favorite tomato database. There are upwards of 10,000 varieties cataloged here. The only listing Tatiana has here is for Mortgage Lifter. there are a couple different strains and colors, but they are all "Lifter". nothing listed for "Breaker".