I've got a city bike with the biggest Wald baskets you can buy, front and rear, and the bike handles a lot better with the weight in front.
I think it would be fairly easy to custom build a bike rack using Wald hardware for a front basket ( I believe those S.F. front racks built by lancekaager and espoused here are using off the shelf Wald fasteners, or at least it looks a lot like the Wald hardware) and creating your own shelf for the rack. You could use plywood, bamboo, plastic, a grill grate, whatever, I guess....and you'd be styling!
IF anyone wants a set of Wald front basket hardware, PM me. I actually broke a Wald front basket, thoughourly thrashed it in about 7 years but the hardware was still good. I had to buy a second basket, so have a totally new, unused set of basket hardware just sitting in my giveaway box.