short channel Si-MOSFET vendors

Dear Labmembers,

I am looking for short channel (< 1um) Si (single-crystal) MOSFET
devices (n-channel/p-channel enhancement mode). I prefer chip FETs to
packaged FETs if possible and would like to know the doping
concentration.

If you know and share the information of vendors and sources with me,
I really appreciate it.

Thanks,
Na Young