I've been wondering about this one myself, but there's a question to be answered first. Is the DLC wheel even analog?
I don't know so far, based on what I've read. I don't even know if the wheel is actually an analog controller.
And if it is, it seems that Heatblur has given us a digital equivalent. So we can take an unused hat switch and program the up position to full up, and the down position to full down.
Based on what I've read in the manual so far, I think this should be enough. For the DLC function I'm pretty sure it's enough, and for the flap control function it has in another flight mode I don't know because I don't understand it enough yet.
I'd still like a clarification from Heatblur on what the original control was, because I'd be really interested to know if the original jet had a fairly unusual analog wheel on the flight stick. But for our purposes I do think that a simple hat switch or pair of on and off switches would be enough.