Hi there. I've had good experiences purchasing automotive firmware kits from reputable online retailers such as ECU Tools (https://ecutools.eu/). They often have competitive prices and a wide selection of products for various car makes and models, including Mitsubishi. Before making a purchase, I recommend checking customer reviews and ratings to ensure you're dealing with a trustworthy seller. Additionally, don't forget to compare prices across different platforms to make sure you're getting the best deal possible.

I recently purchased a firmware kit for my Mitsubishi car, and I found a great deal on it through an online automotive forum. There are often users who sell kits they no longer need at a discounted price, so it's worth checking out forums and online communities dedicated to Mitsubishi owners. Just make sure to verify the seller's reputation and ask for proof of authenticity before making any transactions.