We had a great couple of threads a while back where women were reporting where they had seen the evidence of Stickerwoman and her superpowers, with links to various resources. MNers on there also had amazing design skills. 
www.mumsnet.com/Talk/womens_rights/3331514-anti-trans-vandals-are-plastering-vile-women-don-t-have-penises-stickers-around-london
www.mumsnet.com/Talk/womens_rights/3342172-Thread-2-Anti-trans-vandals-are-plastering-vile-women-don-t-have-penises-stickers-around-THE-WORLD
More resources are linked to here on the also fabulous Get Offline thread: www.mumsnet.com/Talk/womens_rights/3329362-Get-offline?pg=1&order=
I love it that Stickerwoman is leaving out reading material too. 
This is not something I can provide as I have zero graphic design skills but (KLAXON....) I was wondering if it might work to add a QR Code into some of the sticker designs?
To my eye, for example, A QR Code with its somewhat rough graphic appearance could be worked quite tastefully into one of the lightly trimmed-looking hairy bollock areas of the erect penis sticker whilst not jarring with the whole visual, er, flow ?
There are so many great info sites to link to it seems a shame not to share them with the world.
A personal favourite that brings lots of sources together is the Sex Matters website- set up by some brave and generous MNers who wanted to make more info available and draw together resources at the time of GRA reform consultation.
It has a great leaflet setting out the issues and a very handy set of links covering many of the key campaigning women’s groups in the UK:
www.sexmatters.org.uk/page2.html
Sex Matters are also on Twitter: mobile.twitter.com/SexMattersUK
In LGB spaces women may also be particularly interested in links to Get the L Out and the petition for Stonewall
www.gettheloutuk.com/index.html
www.ipetitions.com/petition/dear-stonewall-please-reconsider-your-approach
It would be really great to get this petition to 10,000 (the minimum floor for a petition to Parliament on their website to be debated in Parliament IRL)- obviously Stonewall aren’t bound by the same rules as Parliament but it will provide a good publicity point if that number is reached and Stonewall continued with the King Canute-like authoritarian #nodebate response they’ve stuck to, so far:
www.mumsnet.com/Talk/womens_rights/3384455-Ruth-Hunt-Stonewall-do-not-and-will-not-acknowledge-that-there-is-a-conflict-between-trans-rights-and-sex-based-women-s-rights