When you say Haram money, does it mean interest that you got from Banks? InshAllaah some of the more knowledgeable brothers can mention whether you can give it to your relatives or not.
However, one thing which you can do is PHONE Salafipublications today with your debit card details at 0121-773-0003 or 0121-773-0033 or ask for a standing order form and leaflet to be sent out to you and do mention that it is interest money as it can only be used in certain places. Paypal payments can be made to orders@salafibookstore.com from your paypal account.