Thanks for the the feedback. Although the Monaco folks say that the VIN number called for Michrophor unit, It does appear that I have a Thretford toilet. The pictures of the Threford Aria look exactly like our toilet, although I don't know where to locate the model number to be certain. The suggestion to deal directly with Thretford authorized dealer sounds good. Any comments on finding one in the Louisville, Kentucky area or boarding states?
Thanks,
Steve