Try the Cozy Girrls... they make a really nice one.  Put one on my Cozy about 25 years ago...In the second picture.... I would NOT plumb it so the oil goes back into the sump.  That is some nasty stuff. Instead I took one of my wife's Revlon bottles and plumbed the return into it.

Vance Atkinson
Cozy N43CZ  2500 hrs TT