The 'should you' part of your question is a matter of opinion. I pulled them off my coach, would rather not have added hassle checking tire pressures. The rust/scratches on your rims are likely caused by the simulators.. I plan on pulling my wheels and giving them a coat of fresh paint 'some day'.
As far as replacements, is this a Ford or Chevy chassis?
For ford I found these, claim to be bolt on:
https://www.summitracing.com/parts/pho-nf12r
there are likely many more options.... search ye olde interwebs for '16" bolt on simulators' and you should get a lot of hits.