I’d be all over this.
Create your own Huel!
You have a base of Huel. Dropdowns to mix in
Protein (Isolate, pea, hemp, etc)
Flax
BCAA
Husk powder
Creatine (Creapure, Mono, Hydrochloride)
Leucine
other premium ingredients
Flavouring system (chocolate, bananas, etc)
It’s what I do anyway - one part Huel, one part protein shake. I’d be all over a create your own system and willing to pay for this service.
Or you could start from scratch
I’ve been very tempted to give this one a try, if only to see whether I could keep it down.
https://www.completefoods.co/diy/recipes/cheapest-possible-2000-calories-2
The trouble is, although the daily cost can be quite low, all the recipies have a fairly large initial outlay for ingredients that might blend into something deeply unpleasant and not necessarily healthy (the iron levels always seem to be through the roof).
I think you missed my point. I want to buy my super custom huel powder already done and mixed in one bag 
@JamesCollier I know you’d love this, come on, let’s do it. Imagine your sunday morning, scoop, scoop shake, gym, done! 
Gym on a Sunday morning? No chance!