I recently borrowed a book from the library with vintage made modern knitting patterns. There are a couple that I would really like to attempt for myself, but the wool guide only lists certain brands rather than weights. I'm fairly new to knitting and I have no idea how to find an equivalent. Perhaps one of the knitting gurus on here might be able to point me in the right direction.
The first is a bolero type jacket with a lace pattern for the main body worked on 5mm needles and the bands in garterstitch using 3.75mm needles. The pattern recommends 100% alpaca DK with the gauge 22st and 24 rows = 10cm on the 5mm needles. If i want to substitute what ply do I look for?