The vpn list on expressvpn.com/setup#manual can be copied and transformed into a transmission-ovpn readable format, to create it from scratch with the kost recent servers. With the regex steps below (search & replace), this can be easily transformed
Americas\n
Europe\n
Asia Pacific\n
Middle East & Africa\n
(\w)
\L$1
\s
_
(.*)
$1_udp
(.*)
my_expressvpn_$1