06-09-2017, 12:19 PM
Other sources of oversized inlet valves are available and they may answer their emails and telephone faster.
To list two:
http://www.a7c.co.uk/spares.php#valvegear
http://www.7ca.co.uk/new_parts.htm
To list two:
http://www.a7c.co.uk/spares.php#valvegear
http://www.7ca.co.uk/new_parts.htm