I made a small 4 channel mixer (one for bass, two for L+R inputs from iPod, one as a spare) prior to using the DHA VT1-DI EQ, and that did everything I needed it to.
There's a simple 2 channel veroboard layout here:
[url="http://www.tagboardeffects.blogspot.co.uk/2013/01/2-channel-mixer.html"]http://www.tagboarde...nnel-mixer.html[/url]
You could probably make it for less than £10 all in, it'd be fairly small too.