Only "2" RMKs of 3/16 inch blade stock are eligible for finger grips: The Model #11-4" and the #6-9", Large filet knife. No Model #8's...sorry.
Yes: Compass installed is an available option.
With regards to anything not supplied by RMK, it is best to call with the exact dimensions and ask about the possibility of having it installed on the stag handle.
....Hope this helps,
Capt. Chris