I checked again there. I don't have the option to get this motor from the UK store - only International (Hong Kong) and US appear for me. I'm definitely going to get in touch with DPD though. I should have been charged 20% of the €56 for import duty (around €11) but I don't know where the rest of the €48 for admin/handling fee could have added up to around €37.... Especially after paying the €19 for DPD delivery in the first place....
Anyhow, I'll let you all know how I get on with 'the man'
Looking forward to hearing about your build Slopes - keep us updated on it!