Call shoe stores? Jillions of places sell engineer boots.
Personally, I wear Redwings. Not cheap, but the leather is real good and I've never worn a pair out -they get cut off when I crash.
I credit my last pair for saving my foot. The ER doc wanted to just cut it off. I told him to sit down and shut up. HAHAHAHAHAHAHA (no kidding)
Still have the foot, BTW. I limp and sometimes it still hurts, but I can walk to the garage. And I have a new pair of lace-up Redwings. Not cheap, either.
The Royal Enfield Store sells the Retro helmet that looks like a Davida again, too. I love mine- more comfortable than a Davida. (Don't order from Jafrum. They are crooks and provide really bad customer service)