Dye-sub keycap providers, recommendations?

[opentype]

I’m intending to produce around 100 keycap sets with 110 keys in two versions (50 each) using dye-sublimation.
What are recommendable providers in regards to quality, affordability and reliability?
I’m completely new to the field and this website, so all recommendations are welcome. (Which companies to contact. Which prices to expect. What quality, issues to look out for …)
So far, I have only found a few Chinese providers on Alibaba and the first one I contacted didn’t reply. 

[milko-k]

Hello, I am a keycap manufacturer from China, the process we use is dye-sublimated. my previous keycaps are NP Crayon,NP PBT and so on. Now we have a variety of keycap heights to choose from, with excellent production technology, reliable quality and suitable price. If you are interested, you can contact me, I am looking forward to cooperating with you.