try this link -
https://ebay.co.uk/usr/hfaning
you may need to change your country in eBay "settings" to "United Kingdom" to get the link to work. If I remember correctly, i was able to find a way to message him as an eBay user in the desktop platform, not the mobile platform. I was only able to contact him through eBay. I don't have a regular email for him.
Hope this helps.