i haven't used them myself yet
http://www.researchpeptides.com/ are your best bet in the states they get good reviews and are reliable an quite cheap too i've only used growth hormone and anabolics befor myself but from what i've read on the 2 peptides they work better together as one stimulates GH prodution and the other helps stop the body from thinking it's got enough so stoping prodution as it would normally but don't quote me on this