I was looking for an adaptive equipment that can be used by someone with arthritis and cant really use a piping bag or an adaption that can be made to an existing equipment.

Have you seen this?
(Faze Electronics)
http://www.alibaba.com/product-free/244761828/Decorating_Cakes_machine/showimage.html

I was looking for a link to another (more Heavy-Duty setup), but can't find it.

Would this help?
http://www.wilton.com/store/site/product.cfm?id=3E31922D-475A-BAC0-54C576DE24DBEE35&killnav=1

If you need more info, let me know. My husband just bought this for me and it's still in the box. I can take it out of the box and check it out more if you need me to.