Hello Didier
I just bought a pair of new seat belts from
http://www.ssnake-oyl.com/ which is located in Texas. I chose the "2-Point Non-Retractable 60 inch Lap Belt w/Chrome Lift Latch" because it seemed like the most neutral option and because, really, they are inexpensive. I ordered on the website, then called to talk about shipping. They arrived in a few short days, without extra charges, which is always a happy surprise for us in Canada.
Although I like 3-point belts for a modern car, I decided against them for the Pagoda because (a) I don't have headrests, (b) I'm a tall guy and the shoulder harness would have to go way up and over, (c) I'm not sure I like the idea of adding the mounting points in the pillar behind the door. Also, I agree with you about the stalk-type: they just don't suit the look & feel of a Pagoda.
I tried really hard to find new-reproduction Kangol or Schefenacker belts, but everything I found was really expensive, not brand new or not the style that I liked.