I bought three pair of Matt Newsome's larger socks he posted a few weeks ago. They fit everywhere really well except the calf. They are less tight than the main kilt socks, though.

The only part that is too tight is the part just around the top. I wonder if snipping that would totally undo the knitting or if it could be somehow sacrificed to allow the rest of the sock to stretch?

Since I wear the flashes, they would hold up the sock anyway. I'm not willing to experiment until I find out from someone who knits, though.