This response may not answer your question, but it may help.
Most coax has mil-spec numbers on them which means they have to meet certain specs. If the coax you are buying doesn't have a mil spec number on the coax I'd be really shy about buying it, you may want to investigate further or ask more questions of the vendor selling it.
Generally speaking, the vendors I mention below sell quality coax and wouldn't ruin their reputation by selling the bad stuff.
I think you'll find some vendors selling Belden and other high quality coax with the numbers you've given. I've had great experiences with the RF Connection (http://www.therfc.com/
), the Wireman (http://www.thewireman.com
), and also heard great things about Davis RF (http://www.davisrf.com/amateur.php
) and DX engineering (http://www.dxengineering.com
There is also an ad at the top of this page as I type for ABR Industries (http://www.abrind.com
) but I don't know anything about them.
I'd check the reviews of each in the reviews section and select the one that meets your needs the best. If you want to buy from a local Ham store, that is an option too. You may save on shipping.
The only time I bought bad coax when was I was in a jam and needed some and bought some from Radio Shack. It had a hard plastic jacket on the outside, and the outside jacket split, inside the house away from the bad weather! *ugh*