Loaded on my iPhone, iPad and MacBook Pro using Safari just the other day… not today though. However, I was able to load it in Chrome, then again not Firefox. Seems like a browser security block or something.
BTW: I have ordered from B&L Models not too long ago. Took a while to make it to the States, but the prints are extremely high quality and worth the wait. HTH.
—mike 
Yep, link works fine for me, but am kicking myself i didnt have this knowledge in March, when i was in Saigon. Next time.
OK, problem solved.
I went to who.is domain search, which enabled me to find the BL Models entry and it showed the referral url of http://www.pavietnam.vn. I could then click on that and get directly to the site. I guess for some reason the referral is not working directly for me.
Thanks to @Littorio and @justsendit for your help!
Actually I just realised that the .vn site is just a whole list of domain name providers, so no joy.
;-(
I did a refresh in Safari and was able to open the page this morning. Of course, that may change in the next hour — seems an intermittent issue. 
Also, I’d recommend emailing Bao directly:
baolinhmodels@gmail.com
Good luck,
—mike