I'd email Resonessence and ask - they are always very helpful and I imagine that's something they will want on their website soon anyway.
A lot of the content on their website is generated by users here (and elsewhere) asking a good question. Since the question and answer are relevant they do some mild editing and post it on the site, so anyone else who had the same question can see it. Good strategy in my book.
I agree that the XLR to TRS questions will important for many Invicta users who want to try out the balanced outputs and already have balanced HP cables with XLR connectors, and I hope that these can be addressed on the Resonessence website.
When surfing around the web, it was fairly easy to find places that sold XLR to TRS adapters and cables - they are usually described as "microphone" cables but they all seem to have the standard 3 connector "stereo" TRS plugs, so I'm assuming this would be an acceptable solution for those who don't want to go the DIY route. The pre-made cables don't seem to be that expensive either. In response to a previous post, I assume the pre-made connectors would have L-R-Ground wiring done correctly. As a "best practice" I would be inclined to stick with a fairly short length of cable (about 1 ft or less) and use good quality connectors. There is also a Neutrik female XLR to male TRS adapter (sans cable) available but I would be inclined to stay away from this since the weight of the adapter plus XLR plug together might put too much stress on the phone outputs of the Invicta. Perhaps Resonessence could make some recommendations on how/where to order adapter cables.