So are you looking to replace the steering wheel with one that has cruise control switches?
Assuming that the steering wheel fitment on the ma9 is the same as the MB/MC one, then you're looking at wheels with the same fitment as eg/dc2.
I'm fairly sure that ek and accord shared the same wheel, but it's a different fitting to ours.
EDIT...
Just realised that it looks like the cruise control buttons are an add on to the steering wheel.
It might be worth exploring parts diagrams like on Honda parts uk to see what optional extras might have been available and get some parts numbers to help your search.
If, as the first post suggests, the US integra had it as an option, then the cable fell from that could be compatible - in which case have a spy at acura parts websites in the US for parts diagrams