An update:
Good news! I got this hybrid at last.
The weird bit was there are several out there as we’ve discussed, and I bought two versions, and I love them both. The only tricky bit is getting the colour correct in the photos, and I’ve not managed to do that so left them as they were. Tweaking in photo software just messes up the others colours, so I decided to leave it.
I love this hybrid and its patterns.
I made a purple colour to show the actual shade, or close enough on a computer screen to give you an idea. This colour block is closer to the actual shade than the more reddish tone in the photos.
I am very happy with my two new orchids; and thank you very much JayB, for all your help in tracking down this hybrid. You have been very helpful, thank you.