Looking into printing one but bigger

Has anyone built a mp3dp with a larger build volume not sure what the standard size is but I was looking into something with a 300x300x500 volume

I have a MP3DP XL version that’s 300x380. Can’t remember off hand how tall it is, but I’d guess more than 300 and less than 500.

Is there a print file for the xl version?

I was gonna build a prusa a while ago so I have some parts just laying around

Nope. The 3D parts are all the same, you just need to revamp the milled parts and buy longer rods and lead screws.