I've been looking at different options for this and they are few. Beyond the ones already mentioned, there is the edelrid treecore. Which is kind of like a hybrid harness with a dual webbing bridge, which doesn't appear to have the same range of motion as a true rope bridge. In the same fashion there is the task x-arb harness with the dual webbing bridge. Rich Hattier has been using this model and I have sat in his. It is comfortable in terms of the quick vertical hang I did with it, didn't have time to really move around though. I believe he said that they were working on a variation with a true rope bridge. I believe he also hinted that ISC might be in the process of developing a harness with a fall arrest upper, but I cannot confirm nor deny if or when that may actually be happening or its design in terms of rope bridge. Or if I even heard correctly.
The new courant koala work looks promising, but hasn't hit the market yet and is a bit hard to find any info on, so I attached a screenshot of the results of my search.
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My guess is the next gen treemotion will have an attachable upper. Between competition climbers wearing a second harness over their treemotions for certain events, the new bucket truck rules. Some Canadian areas requiring uppers for all climbing I believe. The two rope UK rule, and climbers there adapting fall arrest devices to from their rope bridges to a second line, which is technically a big no(they were not designed or tested in that application.) All the other harness that are starting to go that route ahead of the curve. I just can't see them missing what is going to be a big hunk of the market share...