So, lately we've been discussing the urawaza - the counters of the Tomikiryu fundamentals. My problem that has made my agent orange act up: there are 17 fundamentals and only 10 counters. So we've been looking for the "lost" counters.
Maeotoshi can be countered by wakigatame. Where'd I find that? Kodokan Goshin Jutsu - technique #4 - kataudedori. Again, kataudedori is not exactly like maeotoshi, but close enough that I bet you can use the same idea to counter it. Check out kataudedori starting at about 1:25.