Yes, dekang was rather popular back when US juices were few.
Some claim that their Marl-bo-ro flavor was
changed to USA Mix in order to avoid trademark infringement, however some people say that USA mix does not taste anything like Marl-bo-ro. Taste is subjective. Could be those Marl-bo-ro lovers who say it doesn't taste the same are just psychologically tasting the liquid, so they think it tastes different simply because the label doesn't say Marl-bo-ro anymore. I dunno.
USA Mix Liquid | LiteCigUSA
Steven's Wholesale Vaping Search Results
Dekang E-Juice 11mg
Dekang Marl E-liquid | USA Mix - 30ML
This link might be useful to you for DIY, I didn't really read much of it myself...
[REQ] Dekang Marl-bo-ro