Any quality cable that maintains the signal inetgrity integrity should work fine. We cannot recommend third-party products. However, here is a 6" audio extension cable that one of our customer customers reports works very well with our audio jack readers. We've had a few more customers try it with good results as well on their iPads. Hope it'll work for you too!
http://www.cablesonline.com/35mmsttmatfe.html
Specifications
- Connectors
- (1) 3.5-millimeter Stereo (TRRS) Male
- (1) 3.5-millimeter Stereo (TRRS) Female
- Gold plated
- Length: 6 inches (0.5 foot)