And I had to drive to Union Farm and Tractor supply that sells Kubota tractors. Not a Bosch Kiki IP part, but they were a metric fit.

I needed 8(they only had 6) so annealed a couple of the old ones. I would have done them all this way but dropped one in the bilge. Sanding them on a flat with 600 grit, the old ones worked fine, maybe took less torque than the new to seal!

I used a hacksaw with the ferules in a bench vise. Two diagonal cuts kept me clear of the banjo surface, and were easier to remove as the ferule just fell away.

New 3/8" Trident fuel line from Rockport Marine, clamps, and Bob's your uncle.