Greetins from Solveig! Unfortunatley, the pattern has dissappeared
from the internet, and apparently nobody saved a pattern. Too bad.
Here is a diagram of one of the things. This is the most minimal
and upnpretentious form of the robe of the Buddha. You will note
that one of the essential features of more involvevd versions is
the over-the shoulder motif. Sort of like a toga.
ideally a kesa is made out of rags. The result can be quite
splendid. Here is a gallery of various types of kesa.
Your Humble Servant