ESM - Ever Soaring Models ( http://www.esmmodel.com/ ) is a Chinese manufacturer of ARFs.

YT International is the UK or european importer of ESM models.

KMP - Kondor Model Products is the previous ESM US importer that built the ESM name in the US. KMP is now producing their own line of ARFs that are not ESM (according to KMP)

TBM - Troy Built Models is the current ESM US importer.

VQ warbirds is seller of various model lines including VQ and ESM. I think they get their ESM stuff through TMB, but that may be in error.