it fits. The picture of one that was cracked thats been running around online is because the dude was tricking with it. Thomson isn't even known for making track parts, they're meant for guys who ride MTB.
and julian, no. thats way too much for a deep-v/formula set. unless its new it shouldn't go for more than 150. If its new and some one is building it for you, then its not that bad.
i haven't seen a picture of it but a dude told me that his faceplate cracked after using it for a year (26.0 in 25.4 stem). it'll fit, but it's still not gonna fit perfectly unless you ream out the other side of the stem to 26.0.
i don't know what track parts has to do with anything, but many track racers use thomson stems on their bikes because of how stiff they are.