Open it yourself, only 4 screws it's pretty easy. Here is a video: https://www.youtube.com/watch?v=CRObVP_diL4
This is the cheapest one on Amazon currently I think, $28: https://www.amazon.com/Kingston-Technology-1600MHz-PC3-12800-KVR16LS11/dp/B00CQ35GYE
The ram: http://www.amazon.com/Kingston-Technology-1600MHz-PC3-12800-KVR16LS11/dp/B00CQ35GYE/ref=pd_bxgy_147_2?ie=UTF8&refRID=0KJCD4BSZ7MT3DYMVG6J with the link for the alpha it comes out to $409.
It will work, this one is cheaper and actually in stock...
http://www.amazon.com/Kingston-Technology-1600MHz-PC3-12800-KVR16LS11/dp/B00CQ35GYE/
My Alpha came with 1 stick of 4GB RAM. I bought an additional RAM module, link: http://www.amazon.com/gp/product/B00CQ35GYE?psc=1&redirect=true&ref_=oh_aui_detailpage_o02_s00
The thing is the RAM I bought is working fine when plugged into slot 1. I contacted the Dell Tech center in my country, and they said since they don't offer this model in my country, they do not have any training or spare parts to repair it for me. Sending to Dell USA means shipping it halfway across the world.