That registrar list is way out of date. Sadly, none of the entities involved nor historical list maintainers have made it easy to find an updated one, but if they did, Joker would be on it.
If your registrar currently accepts DS records, please
send an email with subject "DNSSEC REGISTRAR UPDATE"
and body containing company name, country location, URL,
what TLDs you accept DS records for, whether your Web
interface supports DS records, whether you provide
DNSSEC signing services to dnssec@icann.org and the
Security team will add your registrar to this DNSSEC
page.