R help - Aug 2011 - implementation of split or two-piece normal distribution?

Dear all,

Are you aware of any implementation of the split normal
distribution (also called two-piece normal) in R?

For a description, please consult:
http://en.wikipedia.org/wiki/Split_normal_distribution

By implementation, I mean functions like dnorm, rnorm,
qnorm, etc.

Thanks for your help
Diana