I believe that they both have, for the American market. However, they aren't used the way we are more familiar with and they do work slightly differently to the bulk of what we'd call a centrepin.
MOOCHER PLUS GTPA
http://www.daiwa.com/reel/flymooching.aspx
I did look at the prospect of getting hold of one or two as an alternative to an Okuma Trent. The intention being to use it/them for close range carping and a bit of barbelling where a variable drag would be more useful to combat tow than a standard centrepin ratchet. In the end I gave up on the idea as I got a Trent to try and I couldn't be sure of exactly what I might get buying blind from the USA.
I suspect that the reason neither manufacturer produce a pin, as we know them, will be that they consider the market for them to be too small to bother with. Given that Okuma seem to do OK with their pins in the UK and the USA, I'm surprised they haven't given it a go with a broadly comparable reel.