Hi, I am familiar with those pictures,especially the first one as I have more saved from the original piece. They are all Edo, as it is the case with 90% of the pictures you can easily find online. If you want some extra protection for the elbow you might want to have the same long hinged sode found in one of Katō Kiyomasa armor, as the plates reach over the elbow. You might need some modification for safety, but if is for "buhurt" or similar, is not that their armor is accurate either.
The illustration is from Satō Masataka armor book,ビジュアルポーズ集 図説 戦国甲冑武者のいでたち , I think it has a good visual representation of how this sode should sit on the arm.
As for suneate, any tsutsu suneate with some solid tateage should fit. There are plenty of examples in art of the period like Hosokawa Sumimoto portrait.