Wow! Have you tried EBay? You may be able to do a search in the UK for a acid etch primer. There should be a manufacturer in the UK. I found someone who ships world wide but the cost is 52.00 for shipping. I know that's not an option. I guess because it flamible there are restrictions on shipping. I look around for you and see what I can find.
Edited to add
Here is a source if you use an airbrush,
http://www.frost.co.uk/eastwood-grey-self-etch-primer.html, I have used Eastwood products and always found them to be high quality
Wow! Have you tried EBay? You may be able to do a search in the UK for a acid etch primer. There should be a manufacturer in the UK. I found someone who ships world wide but the cost is 52.00 for shipping. I know that's not an option. I guess because it flamible there are restrictions on shipping. I look around for you and see what I can find.
Edited to add
Here is a source if you use an airbrush, [url]http://www.frost.co.uk/eastwood-grey-self-etch-primer.html[/url], I have used Eastwood products and always found them to be high quality