[Arran]

Rockler Woodworking may have it, Constantine's does have it, it's called French Walnut veneer, and they used a lot of it on radio cabinets during the 1930s and 40s. It's plain cut and not quarter cut by the way. Sometimes it turns up on fleabay as surplus which is where I got some, but there are a few sources of it online, sometimes you can also find a more local source if you live in a city.
Regards
Arran