Mostly they are crappy conversions, a well known fact. But you asked if they were 'out there'.
Btw: see your PM
I agree. While I personally do not mind for paying mods at all (RSS / URD / VRC guys and their work is absolutely worth the money) these track conversions are a pain to look at. In terms of visuals they remind me of the good old rFactor 1 times and I also have some doubts about AI, optimalization etc., to summarize up these releases would be suboptimal even for a free, open beta version.
Different topic: I have moved through some hardships in my personal life and finally got back on track in the past few days. During some random late night drive I realized, that the original Kunos Sauber Mercedes C9 skins are messed up - absolutely missing silverish-gray overall body color effect, wrong driver names and flags on #61, wrong sponsor order and also slightly misplaced positioning on the right side of both cars, wrong tire textures, completely missing #62 car skin and the general 2k low resolution issue.
After a quick search I found a minor fix on RD - but it got removed alongside with the uploader's profile, therefore I have decided to take matters into my own hands.
I will recreate all 3 cars (#61 - red, #62 - white, #63 - yellow) from the 24 hours of Le Mans 1989. The skinpack will feature a map file to catch some of that silverish color, high quality sponsor and brand logos, new tire textures, correct driver names for each vehicle. Resolution options will be 8k and 4k uncompressed, ETA is unknown (I guess maybe in this year?).
Currently some initial testing is in progress on different tracks.