Why not make your own? If a ham fisted, short sighted eegit like me can manage it-anyone can.
It was a bit tricky for the first 1/2 hour. Tried a few methods with little sucess. Then I spotted a fly clip...hooked the tip in and tied a knot. In the end I could make four per minute. Kept it up for an hour or so and produced over 200. It then dawned on me I should get out more so I stopped.
If you have a clip give it a go. It's a bit fiddly for the first few but you will soon get the knack. If you find it difficult to get the end back through the loop to make the knot,put another clip through the loop and catch the loose end and pull it through. Hth.
Chris