HL has a ton of affiliates/partners/not exactly sure what their relationship is. They all do things differently though, many have their own upgrades and fixes (gearboxes or metal parts, etc) of the original HL products, dont write them off so quickly.
AFAIK, the related companies are
IMEX/Taigen
Mato
Torro? Matorro? Are they with mato?
Waltersons