I looked up the part number, 404769R91. Messicks show one in stock, for $99.95. There was another number below, 404769R91C, and the price was $5.55. All it said was fuel pump. Nothing about a kit. If you call a dealer, might ask what the $5.55 item is. May just be the diaphram.
So you may try you local Case/IH dealer. Should be the same price.
I ran that number through all the places I have saved for aftermarket parts, and, nuttin'... So the must be like hens teeth.