Sure! It's this one on amazon
I have been able to improve muscle strength and improve aerobic endurance, but I have to be super careful not to trigger PEM. Doesn’t help with the overall fatigue but helps with function. In physical therapy they had me play with clay. They started me with very soft clay and I worked my way up thru stiffer grades of clay. About 5-10 minutes a few times a week.
Something I was looking at the other day was laptop desks for bed. Put your device on that so you don’t have to hold it. Amazon has a bunch.
EDIt: Here's a super fancy one, but you can get simpler cheaper ones https://www.amazon.com/Cooper-Folding-Writing-Storage-Reading/dp/B07JZ4LDFV/ref=sr_1_25?crid=24LZ245S69LNG&keywords=bed+lap+desk&qid=1574440177&sprefix=bed+lap+d%2Caps%2C148&sr=8-25
There's software that will read the screen out loud to you. It’s usually for people with vision impairment. So look on websites that have stuff for the visually impaired. Some of the software packages also take dictation so you don’t have to type.
Arm fatigue can be due to low thyroid. When is the last time you had that checked? Low iron levels can also cause muscle fatigue. Just because we have cfs doesn’t mean we can’t have other issues too.