>>9944188grnranger tries but there's still a lot of merch that was made in the 90's with little documentation.
There's a listing for Silver that's listed as cancelled but its possible they were produced and languished in a warehouse before getting carted off to ebay. A lot of old info is at the mercy of resources of the time; someone could've called a Bandai phoneline in the late 90's and asked and was told it was cancelled when in reality it was made in small quantities but not listed in that employee's guide or whatever.
https://www.grnrngr.com/toys/power-rangers/in-spacealso gotta love when they were sticking MMPR overstock in the cards.