Hmmmmm, perhaps I'm confused here
but I thought you meant the pattern called for 32" length circs and all you could find were 34"? If I read that right then imho you've no problems with the longer length cable. Also an fyi, Addi makes a beautiful bamboo circular, known as Addi Natura, and they do come in a 32" length. They're pricey but beautiful needles and come with a lifetime warranty. Another fyi here, the Natura's in sizes 11 and up have a different cable which I'm not real fond of, very similar to a Clover or Crystal Palace. Everything below size 11 have the same cable as the Turbo's. hth! Happy Knitting!