HW Spanish stuff?

[Dr Pepper (they call me Mister Pibb)]

Dear HW experts

I am off to Spain by the end of the week, and was wondering if anyone
knew of any rare Spanish HW stuff that I might be able to find more
easily over there?

Alternatively does anyone have any recommendations of where I ought to go
in Madrid, either to have fun or buy records (not that these 2
recreations are mutually exclusive)?

Cheers

Mike w