SierraHawk I haven't yet removed the stickers from our van,but have on various work trucks and have had great success with the 3M product.
https://www.summitracing.com/parts/t...SABEgIlxPD_BwE
Scotchbrite also has something similar ,but can't vouch for how effective it is.
A question for you as I would also like to replace our Sportsmobile stickers as well,where were you able to purchase them as I know Fresno's site is no longer up and running.
Cheers
Roger