Universal Solder has a decent variety of products at a reasonable price. Some kits are their own and others are the same variety that can be found on "discount sites from over seas", these tend to be the better ones that will work and are not as inexpensive, but you know that it will work as advertised. It is a Canadian company, which makes it a great choiice. Shipping is very fast and reliable. I've ordered from them many times and all were properly and promptly fulfilled.