I note what you say about Merida, but for me it's been the only solution. I have a similar problem, I'm 186cms tall, but with an inside leg of 93cms, used to race, and have worn vertebrae in the neck and back, so can't get as low as I used to. After lots of research, and after trying out a few frames, I hit upon Merida's Race range. The Race range features a higher stack, and shorter reach than their straight out racing frames. I bought one of their carbon framed bikes and swapped the equipment for my own Campag gear, and then sold the original equipment. This was a bit of a pain, but I note one or two dealers are now selling Merida frames.
I am 178cm tall and my insede leg length is around 91-93cm (I do not recall exactly). My saddle height is 78,2cm.
What Merida do you have exactly? Is it the Merida Ride (I don't see any Merida 'Race' on their website (unless you have a previous model)?
Are you satisfied with the quality of the frame? I know that Merida also produces Specialized frames, so it should in principle be OK I guess. On the other hand, I saw a review somewhere which did not yet convince me.