The writer asked about a magazine that regularly has temari patterns or to recommend a retailer and books to help encourage her Mother in continuing with temari making.
Promoting temari making... well I am all about that, so here are my suggestions.
There are no magazines (I am aware of) which regularly
feature temari making but there are several books written in English about this craft.
You can find a post on this blog where you will find details about temari books. Some shop front book stores may be willing/able to order in these books for you if you provide the ISBN, Author's Name or Book Title.
The English language books I recommend are Barbara B Suess and Mary Wood. There is also a 5 volume series of temari books written by Diana Vandervoort, (personally I don't find them very easy to follow - but then that is just me, many other people find these texts a wonderful resource).
I don't retail the English language books but I do sell most of the in print Japanese titles and an excellent range of temari making threads, needles etc. from my supply store.
I run workshops in Perth from time to time and I think some local CWA branches and embroidery associations around Australia also do this occasionally (if they have a temari maker in their local guild).
I hope that this information is helpful, please don't hesitate to make contact again for any further assistance.