Certainly, here it is:
https://www.amazon.co.uk/d/PC-Video-Games/New-2013-Neo-Arcade-stick-Controller-STOCK/B00B85XKU8/ref=sr_1_sc_4?ie=UTF8&qid=1484750027&sr=8-4-spell&keywords=neogeox
Or:
http://www.ebay.com/itm/Neogeo-x-Arcade-Stick-For-Use-with-the-Neogeo-x-Station-Only-NEW-/351934494632?hash=item51f0ee37a8:g:iNAAAOSwnHZYU6qc
Or:
http://neogeox.com/index.php?route=product/product&product_id=51
Or:
http://www.superufo.com/products/snk/SNK_NeoGeo_X_Arcade_Stick.html
Hope his helps!
I haven't tried it without the USB adapter as my machine is USB-C only. I will try it on another machine in the house, hopefully later today, and let you know.