Check your brake line to the Drivers side wheel, looking on the inside of the wheel is there any signs of a leak?
Do you have a Power steering vent tube? If so is it vented into the inner drivers side wheel arch? Check that the cap is tight
The drain tap on the radiator is also on the Drivers side, is that dry?
Clutch master cylinder pipe and connections are also in that area, any signs of a drip or leak from the braided stainless line, is the clutch reservoir cap on tight?
Do you know if you have a dye in the AC compressor there are 2 plastic sleeves that cover the crimped rubber pipes which connect to the AC Compressor, if any of O rings in the compressor fail its possible for the fluid to run down the inside of the plastic sleeves and drip at the lowest point?
Keep us posted
Oh one other thing, when was the last time you washed the car? Is it possable you put the car away while wet? Some water may have dripped onto the chassis rails from the Hood rainwater ducts
