Small individual parts for an older Kwikee step motor like the one on your 1996 Coachmen are no longer available. For a Series 28 electric single step on a 1996 Coachman you'll need to upgrade the unit to current parts, according to my contact at Lippert.
If your step linkage is curved use kit Conversion/Upgrade Kit # LC379145. If the step linkage is straight then use kit # LC379769. Please compare the photos of these items to your unit to determine the correct upgrade kit. view full answer...
I may have a solution for you, but the # PLR636-SS is not available in black; it's only available in steel or a polished stainless steel. However, if you wanted to apply a durable Plasti-Dip type spray-on coating to the handle before installing it on your coach, it would stand up a bit better than a paint would, while giving you the look you're seeking.
If you're looking for something with a little less modification involved, the Assist Handle w/ Padded Grip for RV Entry Door - Black #... view full answer...