Some of the Spanish airgun dealers stock Diana at slightly lower prices than the UK and claim to have them in stock or available in 2-3 days.
Google 'carabinas y pistolas' or 'blackrecon' for Spain.
'Mundilar' in Portugal stock Weihrauch and others. They have a HW30S in 'stainless' for 234 euros around £200
somebody please buy it, before I have to
They all have English site translations and all my emails have been carried out in English.