I'm making Reproductions of the Series 1 Lightweight Veloce seats, as well as a Zagato style derivative of the same seat. These seats will fit both 750 and 101 Sprints - Normale or Veloce, the fit is the same. I have 2 x '57 Sprints (05262 and 05880) and a '58 Sprint Veloce (E06193)
I am also looking at producing seats for Giulietta Spiders.
I can not praise them enough and, beside Greig being a good friend, I have a set of the "Zagato" frames which are just great for my Lightweight. They do appear to be of the same family as my SZ seats which was very appealing. I am awaiting the early fabric covering and then I will have them trimmed. I will post pictures.