Hi,
Check out this vendor if you need some styluses with capacitive tips.  The "Steady Stylus" that this vendor makes resembles one that a pALS's husband created for her and then for me (after I expressed more than a little enthusiasm for the simple but perfect design) about 12 years ago.  They fly out of our lending library.  We provide two models, capacitive tip for use with  iPADs and simple stylus for use with paper boards.  I would recommend adding a thin two sided Velcro strap so eliminate grip requirements.  We make them out of PVC pipe and a pencil (or iPAD stylus) so it's easy to thread the Velcro though the PVC pipe.  Check it out. 
 
http://www.etsy.com/shop/shapedad?ref=seller_info

Sincerely,

Amy Roman, MS, CCC-SLP
Augmentative Communication Specialist

Forbes Norris ALS Research Center
2324 Sacramento Street
San Francisco, CA 94115
P (415)518-0592
F (415)600-3778



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