Proxy + YJA is a pretty decent way of finding things, but those proxy feeds can really add up.

Lots of useful tips on this one.

I do think you could probably make non-permanent Shinki head mods via the use of pinning, but that'll leave holes when the armor isn't in place.

Not really?
Konami used to have a nice collection of wallpapers and the like, but those seem to have gone bye bye.
Your best bet is to hunt through Pixiv for fan art and find stuff you like.

YJA (Yahoo Japan Auctionhouse) used to have people selling extra parts from when they'd cannibalize parts from sets, but I don't know how active that is anymore.

Your best bet might be Taobao, as I've seen short runs of bits there. Usually resin, but I'm not really the guy you'd ask for that.

It took Amazon, but my Movie Transformers collection is complete...well minus Grimlock who never got a Movie style fig I liked.

Things hit a bit of a snag in terms of being able to work on her, and I just don't have the room ATM. I'm hoping to pick it back up when the light gets better this summer and I do a little cleanup. At LEAST get the basic body bits done with a coat of paint, if not the entire armor array.

I'd assume so, but no pics yet.
The figs are a way off, with an order cutoff in January, so I wouldn't expect any for a little while, either.

The Frame Arm girls have been brought up before.

They don't really grab me in the same way, sadly. There doesn't seems to be the same level of compatibility and poseability that I enjoyed with the Shinki line.

Yup. You need to buy the bluray box set to buy the girls.
And the box set is 19,440 yen, retail. Not the cheapest way to get a few Shinkis, but it's the first 'new' Shinki release in a while. Fingers crossed it leads into something.

Been a while since any Shinki related news has shown up. http://www.tbs.co.jp/anime/busou/news/index-j.html#news201502062230 If you have some money to burn, buying the soon to be released Bluray boxed set of the Shinki anime series allows you to order a special 4 pack of the main characters from the...