After @John Murray's gladdening announcement about the availability of the VSCode InterSystems Server Manager v2.0 the "Import Servers" functionality has another way to be called -

Click the ... (3 dots) on the top right corner of the InterSystems Tools pane, and you'll see the option below.

It seems to me this would be a good task for the Complex Record Mapper.

See docs and video.

Note for just a Header and Trailer even the "Simple" Record Mapper could be enough and you wouldn't need the "Complex" one, by using the "Batch" feature, see docs here.

Totally agree.