I crumbled and bought some ridgemonkey stuff last night so don’t expect it until next week. If they have it in stock
https://ridgemonkey.co.uk/productnews/714-2
fox do a 50lb one ?
I also alreadyhave the avid lead free leader I can try it on though but at 40lb it may be a little thick but I will give it a go
May see if I can splice some regular braid hook link stuff I have already