Extra large cable needles

Anyone know where I can purchase cable needles in size 19, 35 and 50?? Or have any ideas of what I could use instead???

Thanks
Knitcindy

J-shaped cable needles are pretty secure for holding cable stitches even if you use a smaller size. You’d have to place the held sts back onto the left needle to knit them and finish a cable.

You might be able to find dpns that would come close in size.