Thanks to everybody for their input. Sorry, I didn't have my eye on the ball.
I note no result from swaps etc.
Interesting to hear of experience and grower.

Ooops! I just found it at the bottom of my page. Maybe it does not appear if you are not logged in and simply browsing.
Red face, J

Thanks for those suggestions.
I am not a member of Mammillaria Society.
Where is the wants/swaps section? I heard about it but somehow in my inexperience I cannot even find it by 'search'.
Cheers, J

Last year I failed to germinate this 'common' plant from seeds of mixed species assembled from various sources and generally good results though certain species failed completely. It seems that plant fashion has moved on, and I cannot find plants or seeds from the several UK nurseries that I have se...