How about one of these
£21.74 including shipping.
Mine is a very smooth wet writer
I have one identical to the linked one, and a white veined version also. I purchased the white after the brown. Love both of them. They are a heavy pen though, and that may be a show stopper for you. I also have a TWSBI 540 and a Lamy Studio. These two are better pens than the Kaigelu, imho, but different strokes for different folks, including pen strokes. ;-)