I used a pattern block drawn from one of my old vintage books, which amazingly included some instructions on producing paid-in lapels, just like the real thing!
Along with my screen accurate Budd shirt, plus my Frock Coat made from the genuine cashmere, I have myself a great outfit!
I do have a supply of the fabric and buttons for the waistcoat, so if you are wanting to have one made - get in touch!
Email me at firstname.lastname@example.org
and I can send you full details.