Hi Rob,
Possibly...there has been a lot of speculation as to how big they grew and two of the most vocal and knowledgable megafauna academics - Wroe and Flannery - disagree on just how big TC was. Wroe believes they could grow as big as 160-odd kg, while Flannery believes they were more in the 40-60kg size range.
Keep in mind also that TC was the biggest of the Thylacoleonids - Wakaleo was medium dog/leopard-sized and Priscileo was possum-sized.
I believe there have been something like 11 full skeletons unearthed, primarily in the Nullarbor Plain, WA. Partial skull pieces have turned up closer to home (for us) in Moree and Wellington, NSW.
If you're interested
[WARNING, book plug ahead] Mike and I devote a whole chapter to Thylacoleo carnifex and its possible survival in Australian Big Cats: An Unnatural History of Panthers, together with some interesting eyewitness accounts that certainly sound too odd to fall into the 'big cat' or 'dog' bag.
Cheers,
R
