I heard from Mike at the factory that the single ear Oetiker clamps are fine (they're easier to find) for the bypass fittings of the fuel pump assembly (he just said to confirm that the hose can't be moved once it's clamped), so I ordered a few different sizes of those and got screw-type clamps for the pump inlets that are the correct width.

I was able to get those from Belmetric which is convenient for me since it's local and I can go pick up the order tomorrow morning.

What I ordered.  The 16.2mm size should be fine, but I ordered the sizes on either side just to be safe I'll have the best fit.