Thought I'd chime in since I made quite a few custom portraits like 12 years ago.

I made all of them with a program called Poser, and I'm not convinced I still have the source files for all of them. A few of them I'm positive I don't. Some of them also probably would not look all that good in a higher resolution, because, admittedly, some of them looked kinda gnarly before they got shrunk down, after which they looked pretty good.

I'm not actually sure I still have the hard drive that I made all of those on, but I'm not ruling it out because there's a chance that I do and that the drive still runs.

There's probably only two or three portraits that I'd consider re-rendering -- C.W. Reffner (the blonde green marine, although he'd look SUPER janky), a marine woman who wasn't looking at the camera, and a blonde woman with goggles over her head with a very mechanic vibe to her. Honestly, the last one is the one I'd be least likely to do because the remastered Dropship is pretty close to what I was kind of going for.

All three of them were supposed to be for a mini-campaign I wanted to do called Seren Colony that (judging from the very small notes I left and the few maps I had sketched/done for it back in 2008) was going to involve a lot of defense-oriented maps with one half of the force being controlled by the AI (either resource gathering or the actual defending part). Was supposed to be set before Episode 1 and be about a horribly mismanaged and, in some cases, "mismanaged", border colony.