Yes, the EU Loklik’s store have a bigger catalogue than the USA one, as there it also sells on HTVRONT’s, which we don’t have.
Here they are:
You can try those from Amazon, you can always get them back if you don’t hit the right one (some fit, some don’t). I was lucky with the first shot. And so use all those wonderful pigment liners and all the pen sets you have. And don’t forget pens are not the only drawing tools that can be used 
Don’t rush to use your brush pens though…
Don’t worry about the click. You don’t need it. The holder is a clamp, you only need they don’t jump out with the preasure.
There’s a full learning curve with that tool itself, it is extense. The preasure range any pen can or cannot work with, how it creates different lines, what height does each one need to work properly, how to avoid the tip damaging or hitting the machine left rail, or printing on it or in the mat or the paper border… I encourage all of you to experiment and share our thoughts and tips.