Harvester Parts from Dangerous Pastimes

I was able to keep 32 Harvester Parts using the same method that I used to keep a Pint Sized Slasher Mask, I just did the method after I was ready to grab the last one.

Logged on to a new world and they're in my inventory, unassigned.

I can't place them in my stashbox, sell them or display them. I also can not put them in the Vox Box or the mailbox across the river in Summerville.

Any suggestions on how to make these storable, displayable or transferable?

Also, if i do Dangerous Past Times again, will they disappear?