Found a site that has info and a way to order replacement tact switches for the Triton LE buttons for the Do it Yourself-er.
The part number (from the Triton LE service Manual) is..
(374000600) TSW EVQ11A09K (TR) KLM-2278/79/80 (54 of them, you can count em)
And the website...
http://www.bustedgear.com/part_switch_tactile.html
More info...
http://www.bustedgear.com/repair_Korg_x3_buttons_4.html
Also give http://www.tubesandmore.com/ a try for Korg parts.
Actually I believe this should be the same for all Triton models, not sure on that one, but possibly.
Source for Replacement Tact switches (under buttons) DIY
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Very cool, I hace an old X3 

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Live Rig: Roland Fantom X6, KORG TR61, Yamaha Motif ES6
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