Any VRCSDK3 / udon compatibles Pens or keybords?

Hello ,
I search for a keyboard like this:


or pens like this :

The ones i found are just compatible 2017.4.28f1 and use Standard Assets It seems to me
Is there a vrcsdk 3 / udon compatible solution or equivalent?

Or is there a way to adapt them?

It seems to me that Standard Assets no longer exists for unity 2018.4.20f1 ?
Thanks in advance
Best regards , Stephane