Why don't you just create a system/feat/Magic Item that can drain the experience from the character wanting the item created for them. Then, if the Fighter wants the +3 sword, he pays the exp, not the wizard.
I like the content in the pdfs a lot too. I tend to use books more when I play. However, I travel a lot with a slect group of players and it is nice to have pdf's of books that I do not use a lot stored on my laptop. What I hate is having to buy both. When a printed book is available, it...