Question on Refill for Waterman Roller Most Like Uniball Vision Elite

I have two Waterman rollers, an Expert II and a Phileas. I like the
Waterman roller refills (most than many people, judging by the posts
here), but must admit that my favorite rollerball line for thickness,
wetness and smoothness is that in the $2.50 0.8mm Uniball Vision Elite.
I have tried the Pilot G-2 refills, but that is a thinner line than I
want.

So I am asking if anyone knows of a roller refill for my Watermans
which is like the Uniball Vision Elite. I have heard the Schmidt 5888 F
is very good, but I don't know if it writes like the Elite or if it
will fit my Watermans.

Thanks for any input you might have.