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Re:The Ripe NCC Has Run Out of IPv4 Addresses by iicc on Monday November 25, 2019 @11:46AM (#21629954)
There's the Hurricane Electric IPv6 Tunnel Broker:

https://tunnelbroker.net/

>Our free tunnel broker service enables you to reach the IPv6 Internet by tunneling over existing IPv4 connections from your IPv6 enabled host or router to one of our IPv6 routers.

(It's still obviously less direct, and inferior to your ISP supplying native IPv6, but it may improve your situation.)

Re:The Ripe NCC Has Run Out of IPv4 Addresses by ecksii on Monday November 25, 2019 @01:36PM (#21631254)
That solution requires a routable, Non-RFC1918, IPv4 address somewhere to work. If I understand CG-NAT correctly, you don't get a routable address on your equipment.
Re:The Ripe NCC Has Run Out of IPv4 Addresses by iicc on Wednesday November 27, 2019 @01:08PM (#21650320)
You're right. HE is 6in4 and won't work.

There's a list of brokers at https://en.wikipedia.org/wiki/List_of_IPv6_tunnel_brokers

https://6project.org/ looks viable (OpenVPN) and cheap.