I would also like to note that models already exist, if you need something to reference.
Gimme a sec, will get the link.
EDIT: Sorry, they're all in PMD, the ones I know. Moreover, they're likely already imported from X or something, so it's viewing only unless you can convert them, it looks like. Here they are, though.
Models -
http://www6.atwiki.jp/vpvpwiki/pages/144.htmlPMD Editor -
http://www6.atwiki.jp/vpvpwiki/pages/222.html (DL link is PMDエディタ 0.1.2.3(2011/5/26), in Japanese.)
You wanna try your Japanese (don't know how comfortable you are with the language), you can see some here.
If you need to get this back to X or LWO format for editing, two diagrams are here.
http://www6.atwiki.jp/vpvpwiki/pages/66.htmlThe first centers around X format, the second LWO. Can't say how it'll be after conversion, though.
The PMD Editor alone can convert to accessory X format... whatever that is. Exporting it to accessory X and re-importing it makes it look like all the textures were taken off the model, so it's possible that if you export to accessory X with the PMD Editor, and import it somewhere else, you might just get the model sans textures. From the window that shows text details (not the model itself), Alt-F, Alt-X, Alt-X should do the exporting... for menus, that's File (F), Export (X), Accessory X Model (X). If you can't read Japanese, just look for the menu options with (F) and (X) after them.