Lost forever ? I don't think so.
I have found stuff I thought I sold or just plain forgot I had and haven't seen it in some case 10 plus years( recent 1971 duster kit as an example)
Most recent was I found a baggie with a batch of stock resin grilles for a 1970 Duster,, I knew I bought but had no idea where they were.
Want to find something you lost,,,,,,,,buy a replacement then the original just miraclessly just pops up every time.