It's a bit more indirect, but in the vein of "consumers prepared to pay more", see companies like Bullfrog Power: https://www.bullfrogpower.com
Basically, you don't actually buy power from Bullfrog— you continue to pay your existing utility bill, and then pay a surcharge to Bullfrog, who invest it in green energy projects on your behalf. They're periodically audited to demonstrate that the money is doing what they say it is, but at its core it's a marketing company selling feelings, not an energy company selling energy:
Basically, you don't actually buy power from Bullfrog— you continue to pay your existing utility bill, and then pay a surcharge to Bullfrog, who invest it in green energy projects on your behalf. They're periodically audited to demonstrate that the money is doing what they say it is, but at its core it's a marketing company selling feelings, not an energy company selling energy:
https://www.huffingtonpost.ca/david-dodge/bullfrog-power-can...
But the point is, they have loads of customers, so there's definitely an appetite out there for paying more to get reduced-guilt energy.