@sailor

It is great news! I'm glad that I could be helpful! RadeonHD, oh I was thinking your target will be RadeonRX. But I want to know what connection for video do you use HDMI/DVI or maybe VGA? VGA is the last one that I have not checked and HDMI/DVI was not working for driver RadeonHD v5.14 instant freeze after boot to the desktop. So it was the straight way to RadeonRX and it's ok.

@sailor
I confirm the problem. I've got the same issue. But a solution for that is quite simple and worked for me.
1. Open A-Eon Technology www.a-eon.com
2. Click on RadeonHD V5 Licences Available
3. Choose an HW that indicates the driver you want to buy.
4. You will be transferred to the PayPal site and you know what to do next. :)
5. Check your email you should get a PDF file with the Key.
If your email is empty. You need to drop an email to support@amigakit.com, they will help.
6. Register driver via amispher.com (Amistore registration will not work)
7. "Almost there, almost there... Use the Force Luke..." Now you can download the driver for your Amiga via Updater. :)

Sorry for step by step like solution but a wall of text will be messy.
This is the only way I could find to buy the driver for my SAM460LE.
I hope it will help!