Besides these websites mentioned by my colleagues here are four websites that every chippers "must see".

(1)AllState Manufacturing Company
1-800-262-2340 in New Jersey (732)442-1199
24hour fax (732)442-0256
http://www.allstatemfgco. com

(2)Collectors Display Case Company
mb3.net/display

(3)Custom Displays Manufacturing
customdisplays.com

(4)showcaseshowplace.com

Then there is Quartet Manufacturing Co and the Bergs Co somewhere in midwest who manufactures the unique display they used in collectible stores that rotates like a mechanical wheel powered by electric. I know there are chippers who uses them for their chip collections.

I hope you will be able to find what is suitable for your sister. Happy hunting and chipping.

leostan