It is possible to reproduce these early waistcoats with modern brocades and sometimes Indian silks or by hand embroidery. Unfortunately this is a very long and expensive process.
However, by the 19th century, when dark suits became fashionable, the waistcoat, with its subtle differences and interesting fabrics was often the only chance a man had to show off his love of finery.
I enjoy the research into these slight changes in shape and style, and use it to make correct period waistcoats. Modern materials are often very successful for this item of clothing. I am currently working on a 1840’s waistcoat in blue moire for an education project for Perth Museum and Art Gallery.
I recently made a wedding coat c.1830 in green wool, and a wonderful silk brocade waistcoat to go under it. The suit can be seen on the weddings page, but unfortunately nothing of the waistcoat is visible!