Head over to the RS Export website (http://export.rsdelivers.com/) to purchase. You can indicate the currency in which you want to buy (US Dollars, Euros, British Pounds, etc) and set a preferred language (English/Spanish).

Direct product page links:

Exchange add-on: http://export.rsdelivers.com/product/designspark/dsm-exchange/designspark-mechanical-exchange-add-on/8523012

Drawing add-on: http://export.rsdelivers.com/product/designspark/dsm-drawing/designspark-mechanical-drawing-add-on/8523015

Bundle add-on: http://export.rsdelivers.com/product/designspark/dsm-bundle/designspark-mechanical-exchange-and-drawing/8523019