Thanks for your replies. I know about those two companies, however they sell small seeds packs are are quite expensive comparing germination rate/price. None of those companies make any germination tests.
Normal germination rate for C pubescens is 40% if the seeds are fresh, less then a month. As for C stipulata germination is only 10% for less than a month and it can take up to 240 days.
So I am looking for fresh seeds from just eaten fruits.