Transistioning tile to tile Help? We want to put tile in the dinning / living room no...

We want to put tile in the dinning / living room no problem done floor tile before, our problem is getting a nice transition from the tile i.e. in the entrance and kitchen to the tile we would be putting down! I love the exsisting tile! but it no longer is anywhere to be found! I went to the builder but they said it's to ripened the house was bult 12 years ago! and as far as they know the tile not being made any more!
they couldn't even put in the picture me the manufacturer, SO! any suggestions on how to transition from one tile to another, that willl be different! I enjoy no extra tiles to take with me to the store! so own to go on memory! I even tried taking a picture along. the tile that we have have a high gloss shine to it and a bit of a template in it!
Where can i buy a home thermostat that...
Answers:    Without knowing colors, textures, etc. I would throw out a suggestion that you might create a border or boundary between the two types of tile from another fabric, like, say, slate? or mosaic tile? limestone? marble? This would serve to break up the two differently adjectives areas and define the boundary in a pleasing process that does not look like a mistake or an afterthought.
Caulking My double pane vinyl window??
I agree with what John W have said. I would also look at a "saddle" type threshold. This would be the same width as the door frame, and ramp on respectively side. You could choose any type marble and have it fabricated.
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Why not use a contrasting colour to both your different tiles in a 2" widespread tile at the threshold ?