Round Headlight Conversion for MK1

Hi guys,
I want to convert my MK1 to Round headlight.
Does anyone have a template of an infill panel .
I was planning to trim out the old headlight panel and weld in a new panel that the headlight bowl can sit in.
That way when I fit the grill it should all line up.

Also do I need cortina or mk2 escort headlight buckets??
TIA
Emil