I have yet to have a PDF version of a W9 form allow me to fill it in completely without telling me some portion of the thing will not allow a text field and/or signature. It's a real fucking pain in the ass, is what it is.
Once I got one W9 done, I just send a copy of that PDF to whomever requests one. In at least my experience, there is no need to do a new one each time just because they send you a blank. Perhaps your requests are different, though.
