I've just found these in galleries of random shots, so I don't even know if they're customs or not. I should Google them, I guess.
Here is one that is definitely a Chip Foose creation. The concave grill and chopped windscreen are similar to what you posted but this car looks a lot longer. Difficult to tell of the two cars, which is the chicken and which is the egg. Image Unavailable, Please Login
Lamborghini 350 GTV Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login
Another vote for the 550/575 for me. Traditional style with modern enough running gear to be the best of both worlds. For pure design though I like these:- Image Unavailable, Please Login Image Unavailable, Please Login
Toyota 2000GT Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login
Photos by Daniel Zizka and ns_images. Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login
Mine's a replica created for Ford V Ferrari. Still one of my all time favorite designs. Image Unavailable, Please Login