Fishwife's carders are very good. I have some old, very nice worn in Schact (US made) cards - bought years ago and they work fine but... Fishwife's are now my weapon of choice since I got them have hardly touched my Schacts. They didn't seem to even need breaking in, either. Huge recommend. (And she didn't pay me to say that). I use them even for my 'modern' spinning.
We probably should also say that a distaff is only of use for worsted (longwool) spinning. For woollen (shortdraw) you need carders. So the fibre you'd see on a distaff would be combed, not carded and gives you a very different sort of yarn.
If you look at medieval images of spinners with spindles, they always seem to have a distaff so it is a bit of a re-enactorism to spin on a spindle with no distaff. Piece of forked wood from the nearest tree does the job, especially if you're on the go asyou can tuck it under yer arm. But if you're using a great wheel, you're probably better off with carded wool, although you can use the distaff too for that.
In 'real life' when not doing living history, a wrist distaff is the thing. (Simple bracelet of braid, weighted with a few beads).
Fishwife, who was it used to make the 'Viking' combs in the US? I dunno if they are still going. I hope Jack Greene does make some more combs - will look out for them.