Pardon my ignorance of most things car-tech, but whats stopping you renovating the old one?
An Audi I had a while back wouldnt put dipped beam on, it was fullbeam or sidelights only, the unit from that was a "Sealed" unit to stop you messing with it, and the garage basically said a replacement would cost over £150.
Being a tight git, I ignored the "dont drive it at night, shouldnt let you leave the garage" warnings, dismantled the steering wheel assembley to find a fully riveted unit wrapped round the steering wheel (like an --[O]-- shape). I drilled the rivets, found all the things that jumped out when I opened it (eep), and cleaned the contacts. It tested OK so I installed bolts where the rivets were and reassembled. Worked fine, which is surprising given I didnt even know where the dipstick was!
Maybe if its the stalk assembley that is the problem (tested with a multimeter?) you could try dismantling and renovating the part rather than trying to find a replacement. Just a thought.