OK, thanks!
something like this one? Will need to check boo, but says for 68 forward...
https://www.ebay.com/itm/295495838752?hash=item44ccecac20:g:TEgAAOSwY4Rj1HvY&amdata=enc%3AAQAIAAAA4Gi2qPEazTkKA0VHnAIhUftrdVXdOeaqn1ev7hD3FFrUl%2FgGJLxoVO3NmCYD4HPBiWGnWuCz%2BEgrtn2rGxFRzpcU2G1Zat1I0nqQ3mkFBdZRoAszY%2FuIB9QZfziloz2lBbkYKO7ZNmawH5QXxUfILM0Q1sGogHJoiFqNfImAbON4AWCetrCpcgIdNf%2BpWv3smRTuOq6iE8qVZPHa0%2Fu4Omep3RH11LyNXD%2B8nX2wTdniwwo89AZIVXvDX5W84cUppZwbBzrq9zZAHb%2FiBwURB2efLwCz6v74EaCOF2vo22EU|tkp%3ABk9SR5yG8KiJYg