Proto do a set, but they are expensive.
Nepros do them, but not that easy to get hold of and also expensive
They aren't that common, and fairly niche due to the access issues using them.
Facom are owned by Stanley Black and Decker who also own Mac tools amongst others, so there is a lot of crossover. It is a bit of a mixed bag now and mostly all bought in - some of it is great and some of it, not so much.
Their excellent 440 spanners, for example, are the same as the Mac Precision Torque - and both made in Taiwan by ROTAR who also manufacture under their own brand (Toptul). They also make quality sockets.
Same here, I've never really found a need for six point spanners outside hydraulic unions - Facom do nice ones with a deep offset which I find useful, also Stahlwille ones are top class.
Britool [expert] (also another Stanley company) is not the same as Britool [hallmark] who are owned by TradeMarque Tools Ltd.
You have to be a bit careful with Hallmark.
Older Britool Hallmark might be left over stock made in the old Britool factory before they were bought out by Facom.
Newer Hallmark stuff is just bought in from anywhere and probably no different to any of the other generic chinese products.
The styling is different between them but it is not always easy to tell which you are going to get.
The Britool ‘Expert’ stuff is (mostly) ok for home use but isn’t great. I used to like the the previous satin finish Britool that came in red boxes, again it probably wasn’t as good as old Britool but I never used to break anything either which is the main thing! My Hallmark stuff comprises a few rails of Torx and Allen sockets which seem fine, they cope with cylinder head bolts for example. I wasn’t aware that they’re sourced from various OMs though, I’ll keep an eye on that if I buy any more. These days most of my sockets, spanner’s etc. are from Unior, it’s proper quality similar to the top end German brands (which I admit I also like!).