Try buying these foils, the best i've ever seen... using original cartridges.
I would match these right next to Gerber foils.
You can buy from: http://www.print1usa.com/
They have their own version of protection guard that's better I think... even one with a shine.
prices are great too.
I found these guys because i was searching for alternatives and found that this product was just like Gerber in England.
Then I found this distributor here in the US
Give them a try, good stuff... I only use their foils now.