I got across this synthetic skin on Mercado Livre(a brazillian online market, like ebay):
I don’t know if it’s good to use on a shamisen. The site is totally in portuguese, but here’s the description in english:
Animal Print Snake Yellow Synthetic Fabric 50cm X 140cm
PU Synthetic Fabric
Model: Synthetic Fabric
print: snake
Color: Yellow / Black
Substrate: Cotton Twill
Surface: 100% Polyurethane
Length: 50cm
Width: 140cm
Thickness: 0.40mm
The description also says that the fabric is not elastic. Would it affect on the resonation. Thanks in advance!!!