I have a 2015 Rocket III Touring. I wanted an emblem for the side covers that says "2300 CC." They used to have an emblem on some early models but I couldn't find one for sale. I've read posts where others have wanted such an emblem too. I can't count the number of times people have asked me what size the engine is and they have a look of total disbelief when I tell them. This is especially true with HD riders who assume their engines.must be bigger. (Yeah, I know. This is an ego thing. ;-)
Anyway, I checked out chrome lettering and found something I really like. There are many online seller that sell automotive-grade lettering and emblems but I ended up with letters from this place because they had the leter size I wanted.
Custom Emblems, Chrome Emblems and Auto Badges | EmblemArt | No Minimum Order
I ordered their domed small letters that are .81" high. If you decide to do this, be careful what size you order. Even a slight difference in letter height can make a huge difference in the overall size of of the letter string when it's mounted. Even the 1" high letters were too big. 1.2" is another common size and it was WAY too big but I wouldn't have known that if I hadn't done the following: I copied the letter string from the website and and sized them in Photoshop so they printed out at life size to see how they would look on the cases. Unfortunately, the above website's tool that shows you how they will look, spaces them in blocks unlike some websites that show you exactly how they will look. No problem, though. I just printed them out and then cut and taped them together in the spacing I wanted and then held it up against the cases to find where I wanted to mount them. Then I blocked out a rectangular strip on the side cases to help align them when I stuck them on. Be sure to clean that area with alcohol before mounting them. Also, be sure that if you put them on the cases that you don't put them so they will be covered by the passenger footrests when they are up.
Anyway, I'm really happy with how they came out. I like them better than the original emblem that early Rockets had. They may even wipe the smirk of some HD riders faces. ;-) (BTW, I've owned HDs and I like them.)