Gift Voucher for department stores in Fuengirola or Marbella

We have a special friend who lives in Fuengirola and as we live in the UK, we naturally only see her when we are on holiday in Benalmadena. We would like to send her something for Christmas, but we don't want to simply send or risk posting Euros, but instead, we thought of purchasing a gift voucher for anything between 50 and 100 euros. Are there any large department stores in Fuengirola or Marbella that operate a "gift voucher" arrangement, so that it could be sent from the company direct to our friend for Christmas......so far I've struggled finding any information. Your help would be most appreciated.