They kinda did: there's an issue of Hobby Japan that included parts to make the Zeta Hono:

http://www.gundamkitscollection.com/...o-x-hobby.html

They aren;'t painted of course, and you'll need a Zeta Gundam to use them.

They have add on parts for this kit.

Most likely the backpack.

Know what I hate? All these random Build Fighters releases. With us still not having a complete shuffle alliance in either HG or MG form. Hell, Ill take a RD of them all. I WANT G GUNDAM DAMMIT

Yeah...I'm just sitting here like "Where's the HGACs of the rest of the Wing suits and the HGAWs of the X suits?"

And Tequila.
The world needs Tequila.

Well, now I REALLY need to replace my RG Exia as the handle on the sword for the hand unit/manipulator is broken as the part that helps it stay on the beam rifle part. That's the ONLY thing I question for this kit, is how weak, flexible, & fragile ALL the parts from the F runner are, hopefully that if I get a replacement RG Exia from Hobby Search I won't fuck its building process up :L.

For any old-school MSiA fans out, there, Jungle got in a few rare pieces in B-Grade. Namely Blitz and Launcher/Sword Strike Rouge. Dirt cheap too.

There was some new footage of the Origin shown on some Japanese talk show and a surprise inclusion was the inclusion of the Kycilia waking up naked scene from the manga. Dunno why they put that in there...

EDIT: Here's the video:

https://www.youtube.com/watch?v=TmPmvL8SVMA

https://mlpchan.net/rp/src/1416690851770.jpg
https://mlpchan.net/rp/src/1416690909907.jpg