I managed to pick 12 grommets up at a country fayre, and you guessed it, when I got home saw that I needed 13, so looking around "wickes" yesterday, saw a pack of 6 cane ends, for £1.68 took a chance that they would fit, and they do they have slines inside, so they will fit different thickness poles, and being bright yellow, can be used to denote your first and last pole in the basket, and they have a large head, thus making them easy to push in
so jack, get yaself down to wickes