Thank you for your replies.
I am in South Africa. I imported the amp from Cattylink 2 years ago and they don't seem to exist anymore. I never regretted using them, btw. Got the amp for $2100 shipping included, great service, and the salesman, a mr. Lee, sent me some of his personal used valves (the small ones) for a bit of rolling. The amp is driving Westminster Royal SEs, and I couldn't be happier.
Anyway, I finally found the LM agents here. Thanks for your suggestions.