The only place to really get LMTs is
http://www.hydromarine.de/ but I would hesitate (and did and got a Neu instead) because the exchange rate has made them really expensive.
I went to get a quote on a 1940 for a 1/8 buggy and with the exchange and shipping it was close to $500 USD - that's almost 2 Neu 1515s or 1521s.
Also - there is a bit of a language barrier with them. I asked for a quote and decided not to get it, but I got a PayPal request for payment about 2 weeks later as they had placed the order and were trying to bill me. It took about a week of back and forth e-mails (the time change usually made e-mail exchange take a few days for back and forth) to get the order finally canceled.
My personal opinion is that the Neu's are just as strong as the LMTs. And the new MMM run the Neus butter smooth - much smoother than the MM with the firmware update.