I've replaced the teeth on my backhoe bucket twice now and I have a brand new set on my bench that I need to do pretty soon. It's on my winter list of things to get done before the land dries out. Mine sound similar to yours, with the pin that holds them in place. I found that I had to weld my teeth on to keep them in place, or a tree root would cause them to come off. I remove a lot of trees with my backhoe.
I found the best prices for them on Amazon and the first two times I bought them, it went great. This last time, they sent me a box full of bolts instead of the teeth. Then they wanted me to pay for shipping to send them back to them before they would send me my teeth. I had to go through Amazon to resolve this, and that was both slow, and without a successful resolution. Eventually I was able to contact the company directly and got ahold of somebody that agreed to send me the teeth I had paid for with me having to pay to return their mistake.
New teeth are really nice. There is a huge difference the first day out with them compared to what it's like digging with the worn out teeth.
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