Sometimes when we're learning something new and we read a compelling article...the "facts" from that article can stick with us pretty hard. Someone who has been doing the same thing for years might read such an article and just laugh...but for someone just learning, it can have a big impact. Maybe the article was flat-out wrong. Maybe you misunderstood it. But either way, your perception that rodent hair is bad for snakes is real to you. I get that.
I do hope you can understand that folks here are trying to help. That we've got combined experiences of decades and hundreds and thousands of snakes. There is a LOT of false information out there and it can be confusing for someone just starting out to try and figure out what's real and what's bunk. I hope you'll be willing to listen to the general consensus of a whole bunch of keepers who know what they are talking about....if for no other reason than to simply make life easier on yourself.
There is absolutely no reason for you to fret about hair on your rodents. Shaving is out, as you've already stated. But you also really don't need to worry about trying to find hairless rodents. These animals were created to eat WHOLE prey items and to make use of the entire prey. If you remove one significant element of that item, you are removing something that the snake needs to stay healthy. It's one reason ball pythons poop so infrequently...because they are so very efficient at using up the whole prey. Very little material is left over as waste and it takes awhile for enough to build up for them to eliminate. No matter what one article said, I can promise you there is NO scientific evidence supporting the supposition that rodent hair is bad for snakes that are meant to eat rodents.