Without wishing to re-open an often long debate, the link takes us to Med Preps not Lab Blues
Salonwholesale on Amazon.com used to post these to the UK at a very reasonable price so may want to check them. If this is no good let me know as I have around 60 of them available. They are no longer in the blue box but they are wrapped in the blue paper.
Regards, Micheal
In the UK you can get them here:
http://connaughtshaving.com/perslb.html
Or here:
https://www.razorbladesclub.com/razorblades/
well the packaging isn't the same as the ones i have in my desk drawer, but they were lab blues from connaught, so i guess they are the same ones, the picture on the pack that i have has personna super / made in usa so that ties in with the ones on the website.