I just checked and the Peak 2038 loupe is available on Amazon, at least in the U.S. I also echo the suggestion to use a screen protector from ScreenPatronus (which also does business under the Lexerd brand).
Now about that Macbook...
John
Thanks both John and Victor.
That 12" MacBook might just become a 13" MacBook Pro as it's, yes, 1 lb more, but at $50 less than a comparable 12" MacBook one gets a lot more computer in addition to the option of specing it much, much higher. Like 2.5 GHz i7 (versus the MacBook 1.4 i7) and 1TB SSD for about $500 more than the MacBook with 2 c-ports instead of one. Also the MacBook Pro RAM is slightly faster than the MacBook with 2133 versus 1866 for the MacBook. GPU is probably better on the MacBook Pro too.
If more c ports are desirable (me), then the MacBook Pro touch at 3.5 i7, 16, GPU 650, 4 c ports, 512 SSD is $600 More than the 12" MacBook, configurable to 1TB SSD which in today's world just might be needed.