I ended up buying 35 and 38 from my local dealer--don't remember whether I couldn't find them elsewhere or just didn't want to wait for shipping. Each one was a little under $10. Would be worth checking Phil's price for the complete set, but the hard plastic tubes can easily be reused if not broken.

56 and 59 were also brittle on mine and broke into pieces upon removal.

For 35, you might try cutting off the bulk of it, then holding a vacuum cleaner nozzle up to the last part as you try to pull it out with small pliers. The vacuum should prevent fragments from falling into the valve cover.