Looking for reommendations for an add to cart bot

Hello. I am new to the bot world so I don't know much about them. I am looking for a bot or script that will let me buy limited release products as soon as they go live. I know there are shoe bots, and the principle is similar.

I am just trying to buy some things for personal use and I assume other people are using bots because I am unable to get these items. Most of the sites selling them are fairly simple, often wordpress, and I seriously doubt they have any kind of protection other than what comes with their shopping cart plugin.

Because its not typically the same site, I would need to be able to configure the URL, and options like color etc.

Can someone point me in the right direction for this? Again, this is not for commercial use, just personal so I am not trying to spend a lot.