Is keeping fat low on the refeed really all that important? It doesn't seem to be with me--it's more a matter of getting above maintenance calories. I look forward to a guilt free Ben & Jerry's Chunky Monkey fix.
Personally, I don't get real anal retentive about the dieting and refeed and it still works like clockwork.
As for getting fat calories up, I use a whole half pint of heavy whipping cream mixed with a little water and protien powder, and use it as a sipping drink while at work. Tastes pretty darn close to a real shake (keep it COLD!) With 100 grams of protien, the shake is just shy of 1400 calories alone!
Bend whatever rule you need to to make the diet work for you!