Where to purchase different jaw trainers

[gtr]

I've been using a 60 pound resistance jaw trainer (the chewy plastic things) for about 6 weeks now and have insane differences. Quite literally fixed my failos. However, this resistance has become way too easy for me, and im stuck doing what is essentially high reps low weight. Can someone link me higher resistance level trainers to purchase (70 pounds+)

 

[cchad]

I've heard ppl say they buy it from alibaba