You can get the additional body from Giantoy https://giantoy.com/products/1-6-gametoys-gt-010a-additional-pack-no-head?_pos=3&_sid=9a9f979c3&_ss=r
Not sure where you can get the default figure
EDIT: Ah, just had a look at Gundamit, https://gundamit.com/c/gametoys_0049 you should be able to see...
Sorry, I meant Gametoys, I was just wondering if it would be possible to suggest to them if they could take pre-orders so they can have a number of how many to make instead of just making a few and it being out of stock within like 30 minutes.