Hi bayucca,
After 3 months possibly found a partial ID
Limacodid Slug Caterpillar, your thoughts please sir.
http://www.whatsthatbug.com/2010/05/06/mystery-from-thailand-caterpillar/
Hmm, your links show rather spikes than "fleshy tubes". I would not be too fixed on Chrysomelidae, could be, but could also be something else, even not a beetle. As you can see I was careful with my comment ;-)...
Hi bayucca
Turned up some similar (ish) images searching on your suggestion, identified as Chrysomelidae larvae
http://www.whatsthatbug.com/2008/09/27/unknown-tortoise-beetle-larva-on-iris-leaf/
http://bugguide.net/node/view/538608/bgimage
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