Just copied this off of the GPLEA forum:
"SC is working on a Mosport Rainpatch. I just started playing with values
and such last week. It will feature a rainy version of Mosport along with
surface grip chnages, graphics updates, and an accurate to Mosport carset.
Look for it in January or so, the editors I'm using are very in-house alpha
but will be released publicly following some further development."
Sorry if this isn't news. First I've heard of it.
Rick