hmm... if you can find a way to use PayPal.. then there are few websites where you can get it!! PayPal is better, save money and request from your mother to send you money to your PayPal account through her credit card.. and you can pay her back hehe XD
thats how i did!
I got mines from this website::
HOW TO DRAW MANGA -- MANGA UNIVERSITY
or you can try eBay! you can even find cheaper ones there ^^
eBay - New & used electronics, cars, apparel, collectibles, sporting goods & more at low prices
^^