I've been getting through the winter with no heater fan. Actually, I lost fan function the tail end of last winter. I don't usually wear a jacket when driving, but wearing one makes it warm enough for me. I do have heat, just nothing pushing it. In the evening I shut the doors on a custom-cut tarp for across the windshield, to eliminate the need for the defroster. Works like a champ! My only worry has been driving in snow or freezing precipitation, but I've dodged that bullet so far.
I really do want to fix this issue, though. I found this video and am going to go this route. I've been hung up on paying $200 for an adaptor harness and the other option, change out the plugs as Sean has suggested. I'll just create a rats nest!
Time to hit the junk yard to clip out a 96-00 heater control w/a length of wiring. if the clips all break like mine did, I'll buy an aftermarket unit. They're cheap