iPhone 4 and Otterbox Defender Case: which dock extender to get for ihome dock?

A couple months back, I purchased my mom an ihome ip9 docking station to use with her iphone 4. It's worked well, but recently she's purchased an otterbox defender case which ultimately has ruled the ihome dock useless as the phone will not fit in the ihome dock with the case on the phone... and she's not all for removing the case every time she wants to use her ihome.

So, my question here is:
Is there a dock extender that I can use to connect to the iphone 4 allowing me to put the iphone in the dock with the otterbox case on?
The alternative is to buy an extended cable.
I'd be quick to purchase something like this but my issue here is compatibility. I've seen some people say that, while the extension cables will pass audio, they lose the ability to charge and control the iphone/ipod directly from the ihome unit.

I'm hoping that someone here has been through a similar situation and can offer me advice. Until we find a better solution, she'll continue to run a charging cable out of the wall adapter and a 3.5mm cable into the ihome's aux input. This is far less than a desired method but it's the only alternative we have until I can find something to fit the bill.

Thanks,
Erin

thanks for the feedback.
care to explain what/how you modified the inner shell? I'm not familiar with the otterbox, personally. My mom would have a fit if I messed with it, so I'd have to modify it on the sly.

leroybrown said:

After having a look on the net today, maybe one of these might be all you need and no modifications on the sly

http://www.gadgetboost.com/products/DockExtender-Boost-iPhone-iPod-iPad-Dock-Extender.html
hope this helps

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chris007 said:

I came across this extender "slim." The site says it works with otterbox cases, and I think the "slim" feature deals with the problem caused by the otterbox's inner lining. Looks pretty similar to the one above too. Hope this helps!

Click to expand...

Just wanted to update this thread...
Looks like the two above are the same product. I ordered the gadget boost extender and got it in a couple days ago. Gave it to my mom and she just called to let me know that it works perfect and that she was able to control the ipod through the ihome dock with this, too (which is a tough to find feature). So, thanks for the tip!