Categories AutoComplete list not deep enough

Hello,

I sell gun holsters. http://www.holstershack.com

As you can see there are over 20 brands and over 100 models. Every model has an OWB version, an IWB version and so on.

I was trying to break them all down into the appropriate type of holster. But as you can see from my screen shot the autocomplete list doesn't go down far enough. I need to go down a lot further than that. Is there any way to solve this ?

Thank you,
Fred

Have you tried increasing the height of autocomplete box?