I am trying to find some short lengths of clear white pine or fir, rough sawn all the way down to 1/4 to 3/8" thickness.

We would be using this as shingle stock, so it needs to be clear of knots. But this is easier when you consider that we would be using lengths of maybe 3 feet, letting us cut our shingles from the section between knots -so we don't really need clear boards, just to use the clear portions. We would be looking at I think D-select grade

It is possible we could buy 6" wide 4/4 boards, and cut 3 think planks out of each with a shop bandsaw. But if someone has more accurate equipment to make this, that would be good.