Ha, funny you should mention it...!
I was actually thinking about it this morning on my way in to work. My local junkyard just got another Aspire in stock today, so I'm going to head over there this weekend and get some. I think they're $10 each at my local yard, so this will be a $40 experiment, but it's for the greater good.
I'm a little hesitant about putting small wheels on the front, but I'll probably try it out anyway (at least one fill up) to see what happens.
I'll post my results as I make them happen...