I know of DML, Tamiya and Testors/Italiaei (sp)
I also know all are out of production, but all are also available on eBay, to varying degrees of price (the DML kit os most attractively priced, but the shipping from Hong Kong doubles the price)
From my recall, the Testors/Italian collaboration made nice kits in the 80s, but that was seen through the eyes of a young teen, was it really so?