Art Pro VLA into a stereo DBX 160

Hi Guys,

I am thinking of gutting my Art Pro VLA into a stereo DBX 160 but cant seem to order any pcbs from abe AC Sounds?
My aim is to have another 2 channels for kick and snare as i already have one stereo CLX 160 for the other kick and snare mics i use.
anyone have any other ideas in changing this or getting hold of something?
i may even entertain a 4 channel unit in 2U if anyone could suggest something which is along the lines of a DBX160, simple controls  with just ratio, threshold and output.
I can make my own pcbs (single sided)

regards

Spence.

Also considering this

http://diy-tubes.com/image/data/manuals/that4301-v1.5.2.pdf

Regards

Spence.