R!Syaoran would be the biggest SyaoSaku fan ever.
He'd wear an S+S t-shirt, and everything.
Interesting observation on the goggles. I have a feeling, though, if R!Syaoran does end up wearing Syaoran's clothes (considering they're a perfect fit and all....) he'll probably drop inconvenient articles of clothing regardless of sentimental value to Syaoran, I think. He seems like he's not really the sentimental type, in my opinion.
But it could be a price too!
Or a portion of a price. I think a soul, or something would cost more than goggles.