Apparently I anticipated this question in 2014. I came from the past, so sorry I'm late. You probably already found something anyway, but......
So yeah, 40w
cool white compact florescent bulbs, by Globe, it would seem. It took a LOT of trial and error (read: wasted money on different bulbs that didn't look right, too yellow, etc) so I'm happy to pass along the tip for anyone who might be looking.
Globe Electric 00014 9 Watt Energy Saver A-Type CFL Medium Base Light Bulb, Cool White, 2-Pack
I think I bought an extra pair and stuck it in my coin bucket, but hopefully these last a long time. Plus they run cool, so no chance of melting the marquee or anything weird like that.