Radio/Arial + radio stalk

[PocketFighter]

fitted an aftermarket stereo, can no longer use the stalk on the steering wheel, is there a way to wire up the stalk to the unit? to be fair i didn't check but at the same time i didn't notice anywhere to plug it in to!

also the arial, is it worth changing to a sharkfin style? just want it to look a little different!

thanks