I found a mat online from GolfTown that I will check out this weekend.
Here it is
I'm not sure the depth of it, I can't tell from the picture.
I figure this and 'whiffle' golf balls in my apartment is the best I can do.
Also, because I will be hitting off the mat... I will need to adjust my stance height. Any idea of what I can use to stand on? I'm thinking about going to Home Depot or something and just picking up some carpet samples. Likely 2 samples, just one for each foot, should be good enough in putting me level with the mat.