I seem to recall that we've had them here, but don't know where Chris found them. It's been a while though.Haven't seen any in the US.
Also popular in the olde country and a favorite of mine. Occasionally served to guests by my better half.
Chris confirmed that she found poor imitations some years ago. We don't recall where, but the custard wasn't what we were used to (Chris called it "fake").I seem to recall that we've had them here, but don't know where Chris found them. It's been a while though.