A banjo would need a machined spot face on the caliper and correct threads for the banjo bolt. Hard to tell from the pic. Need to pull the line to tell.
In-line tube sells all manner of fittings and adapters... once you know what setup the calipers have, you might find something there.
I attached pics of where the brake line attacks to caliper and the fitting end. It looks like a 3/8" 24. Does it look like it will work with a banjo? If not, what fitting would work?
I really appreciate the input very much, I know very little about this stuff.