We have an ACS 3.4 compatible e-commerce module that integrates with SecPay rather than Cybercash. It's kind of ready to submit though we don't know where to submit it 😊 since ACS aren't interested in 3.4 any more. We've just been sending it out to people who've asked for it. Don't know if there'd be any interest in porting to OpenACS 3.4 (pretty easy) or OpenACS 4.0 (not so sure).