I stumbled upon this Chinese online marketplace while looking around for other Madras snuffs. Bingo: N.C. Arya, Perumal Umbrella and ST Shunmugan STS Madras snuffs are there. Not sure about Sri Vijayalakshmi Tiger Brand and Sri Sastha Brand 55555, but both do look like madras
(and are produced in Chennai as well): https://www.chinahao.com/product/520685150390/
(scroll down for pictures).
Frankly, I spend quite a bit of time browsing, searching and exploring.. I'd love to try some stuff available there, but I am hesitating about placing an order. I didn't hear anything about chinahao.com before. I would appreciate hearing your thoughts on this.