I've never heard of such a sample on this forum (nor the request). Have you tried a pizz sample with a small delay between the four notes? Maybe applying a moderately slow attack would lessen the pluck sound enough to be convincing.
I've tried that but it doesn't really cut it. Imagine a strummed ukelele for instance and think how that would sound if it were a viola instead, totally different feel, sound and attitude. There are recordings and music pieces of strummed cello, etc., which are quite unique in their sound. Eventually if the concept works, I'll record real players to do this, but being able to hear an approximation would be great to compose with and explore.