There are 2 'Champion Spring' shops in Fort Worth:
Champion Spring is located very near to downtown FW; Rays is about 3 miles south of downtown on I-35W . Very easy to get them confused. I have done business with both of them--Rays is very business-like and not easy to get advice in person, and they do a LOT of commercial truck work; Champion is much easier to visit with and get ideas.
Both are competent companies, Rays is somewhat easier to access with a large RV.
Neither are listed as able to align Morryde IS on the Morryde website, but either ought to be able to install a riser. Alignment is going to be important--be sure they understand what you are needing done and if they can align the IS after the install.
I had axle alignment problems on my previous Suites--Rays wanted $225/axle; Franks Wheel and Alignment did it all for $250, but this was over 5 years ago.