There are several reliable sources to buy DIY laptop kits for building your own custom laptop. One option is the Framework Laptop 13 DIY Edition, which offers a modular design and allows you to upgrade and customize various components. Another option is the PiTop Raspberry Pi DIY Laptop Kit, which is a modular laptop with a retractable keyboard panel that allows you to place your Raspberry Pi and start using the computer.
Additionally, you can also check out custom PC builder websites such as Newegg, which offers a variety of components and configurations to choose from. Another option is Origin PC, a custom PC builder that offers custom-built computers and laptops for gaming and professional use.
If you're looking for a more budget-friendly option, you can also consider building your own laptop from scratch using components from online retailers such as Amazon, Walmart, or Newegg. However, this option requires more technical knowledge and expertise.
It's important to note that building your own laptop can be a complex process and may require some technical knowledge and expertise. It's important to research and carefully consider your options before making a purchase to ensure that you get the right components and configuration for your needs.