There's a nice Blancpain Endurance Series mod being put together over at F1Classic by PetraGTC. She's got most of the cars already with a good variety of skins too. She is well known in the modding/conversion world and puts out quality conversions on a regular basis. I used a lot of her mods in Race 07 though she recently stopped doing Race 07 mods and is now a full time rF2 modder/converter.
It's still a work in progress (v0.9) and has some issues/bugs to be worked out but it's progressing nicely. One issue you'll see in the video is there are no hand animations yet. From what I understand hand animation is one of the more difficult things to accomplish when modding/converting.
Once the car list is complete (no Vantage or GT-R yet) and the bugs are worked out, this will be a must have for any rF2 player.
Last night I raced and recorded a 5 lapper at Silverstone. The audio in the vid didn't come through very good for some reason. InGame audio is much better than what you'll hear in the video! I think FRAPS was struggling a bit too as the video came out a little choppy. The vid is quite long but well worth the watch in my opinion.
BES at Silverstone