Just before we decided to move from our ROO HTT to our new TT, we ordered a new decal for the rear bunkend. Our trailer is stored undercover 24/7, but this one section was in the sun all day. I ordered it from FR and it was right at $50 - can't recall if that included shipping or not. Replacing it is not a hard job. A hair dryer to loosen the old one and just peel it off slowly. Clean the area with paint thinner or whatever the mfg suggests, rinse well and dry. You'll likely have a shadowy area around the old decal. Mix up a bit of Dawn and water and spread it on the area, position the decal and then GENTLY use either a squeegee or a wallpaper smoothing tool to smooth it out. The soapy water will let you have some time to reposition if you need to. The instructions sent by FR didn't mention the water, just slap it on, but they do it all day long and have plenty of experience. When we had our big boat, the lettering we ordered for the transom said to use soapy water and it worked like a dream. Took me maybe 20 minutes to remove the old decal, DH did the cleaning, rinsing and soapy water thing and then applied the decal. Not much more than half hour or so.
That said....my cousin's DH removed the striping along the entire length of their aluminum sided KZ plus all the other decals and he said it was a PITA. Their trailer was stored outside in full Houston weather for about 7 years when he did this project. If you're at all a DIY, suggest you find out how much $ and if reasonable for you, then at least give the removal a try. If you're nervous about the replacement, then have that done. It's really not a big deal when you get into it.