The Tears of the Kingdome Press Kit has already been sold a few times on eBay. There is also one currently listed:
https://www.ebay.com/itm/176174012793
I've seen the MArio+Rabbids kit on eBay at least twice. The last time it was available was from this seller, who also sells other nintendo press kits (for example Mario Strikers):
https://www.ebay.com/usr/hiddensquid6
Unfortunately, I have no idea how many units each exist.