Who's got the starter wrench? 5/8" curved
I gotone, but it is really old. Not sure what brand. I would guess MAC, Snap on or Matco would have one.
BUT, you could take a regular, long wrench and heat and bend to suit. I bought a set of line wrenches and 1st thing I did was heat and bent to get into where I needed
Good Luck
might check out Harbor Freight.com and see if they have it.