I've never seen this attachment before but I will keep an eye out for it going forward.
I also have the same problem with Lowes.... I always leave with more in the bag. :)
Although somewhat different from conventional burgers, you may want to try smashed burgers cooked on a skillet.
This is pretty much how the gourmet burger places around here operate.
I always remove the silver skin on the bone side of the ribs before rubbing. I generally use a butter knife to get underneath and then grab it with a paper towel and RIIIIIP!
I remove it because I find it gets a paper like texture after being cooked and isn't pleasant when eating. I also...