Yes, this neck was a completely blank paddle! It is not angled though.

The PBG 628 mm 3 x 3 necks with the blank paddles may be able to be converted to a 6 in line!
If you are willing to dowel the holes, cut the paddle and graft the cutoff back on to the other side. As long as the 6 in line holes are on the original, non-grafted, section of the head stock - it should be fine as far as strength. The 6 in line would need about 15 cm to make it work - this seems to fit with my 3 x 3 necks!

It may be worth looking into. It may also be worth contacting Tim at PBG to see if there is anything similar in stock.