it's great to see members wanting to spread awareness in a varitety of ways...thanks for the inquiry. Unfortunately, it's usually required that an organization pay for these sorts of items up front with a large minimum order requirement.
Without knowing that the "masses" would purchase - and considering we have a relatively small membership at this time - it is not the most effective place to put PF funds.
That said, I will research a little, possibly these magnets could compliment another fundsg project ... or maybe through cafepress they could become available in future.
In the meantime, if you want to use your car to advertise our cause, remember that PF does have license plate frames available for purchase through cafepress.com. ALSO, we have a stock of Preeclampsia Fnd royal blue awareness bracelets that can be bought (just a few dollars) and worn.
edit: I see Cindy replied right before me with the link - thanks, Cindy!