I don't know since it's a discontinued yarn but premier is now selling a similar yarn so I expect the craft stores will get this in as so many make the trellis necklaces. You might find some of the original on ebay or etsy. Mary

Here is a link that might be useful: Premier yarn

There are only two patterns on the Premier yarns website using the trellis yarn.
One pattern involves crocheting, and the other is neither crocheted NOR knitted.
See:
http://www.premieryarns.ca/product.aspx?id=6896&pid=166517

And while snooping around the Internet, I found: "Similar to Lion Brand Trellis and Bernat Matrix,
City Life Ladder yarn is a glitzy ladder yarn."

HTH.

Yes the premier yarn is the city life stuff, probably a knitting video on youtube for it I would bet. Most people I know make and sell the trellis necklaces that don't involve knit or crochet. Mary