Ok, after a glance at the literature, I understand those distributions are quite tricky to sample from. Using RCall might be a bit overkill. Maybe http://prac.im.pwr.wroc.pl/~hugo/publ/AWeronRWeron95_LNP.pdf would be an easy (if slow) way ? (although I am not a statistician so I cannot judge its accuracy). I could give it a shot for the package if you feel it's worthy
Best
