I'm sorry I can't make a recommendation for a shop to remove your Diamond Shield in CO. However, the shops that I know of in FL. charge anywhere from $500-$1000 to remove it. It is a very labor intensive project.
Try contacting some RV dealers in CO and see if they have any ideas who can do the job.
Tony & Ruth........... FMCA#F416727
2016 London Aire 4519, Freightliner chassis, Cummins ISX, 2018 Jeep Wrangler Unlimited, Blue Ox Avail with AF1. TST 507 TPMS