I supose a guy could have a front ramp soldered on and have an inexpensive, albeit fake, carbine.
You could turn it into a faux carbine. Find the right guy to install a front ramp. I don't know a good person for the job. However, I have a barrel that someone did that to and they did a pretty good job of it. In person you can't tell it had been "re soldered". Barrel is 21 or 22" I believe. Its a shame someone cut the barrel on that nice transition rifle you have there!!!