The seats shown on Ebay appear to be similar to Recaro "LS" seats from the previous dacade. These sometimes come up for sale on Ebay. Recaro made adaptors to allow their seats to fit most 105 series Alfas. With the proper seat rail adaptor, these seats should fit your GTV (although you may want to remove the console if one is fitted). If you can find a set, of something similar, it would be pretty easy to have them upholstered in the style of the above seats.