As usual, I've produced to files to go with my latest model, so that anyone can build theirs at home. Here are all the files, including those for the previous Le Mans cars I've done:
If you're new to this, here's how it works: you'll find two files named for the I.D. R. One ends in _Build.io , this one you should upload to Bricklink, a website that'll help you find all the parts you need for this build. The second file ends in _Instruc.PDF, and this one contains the building guide!
Now, it's possible that this guide is a bit weird, unlike Lego's official ones, which are always fantastic. The reason for that is that I automatically generate mines from a software, and sometimes it gets a weird idea on the order of the steps. But anyway, you should be able to piece it together with relative ease.
Some of the parts you'll get from Brickling will be a bit different from what's shown in the PDF: that's because I had to change a couple of them so that the model is easier to piece together. It's a parts availability thing. Now, these changes are very minor, and mainly affect the color of a couple of parts, nothing major.
But if you have any question, I'd me more than happy to answer them in the comments below! Happy bricking!