about payment

i wanna buy a pad for my mom as a birthday gift, she's birthday is on feb. 12th , the problem is i just earn 300 dollars from my part-time job , so i dont have enough money to buy it before my mom's birthday .it 's her 50 years old birthday ,so i really dont wanna miss it . can i pay 300 first and pay the rest later ?or is there any way i can do ?i also wanna do the engraving too ,so i have to order eailer ....hope you have some methods can help me ~thank you so much !