At home Taxidermy?! 
This is the best way I have found for keeping my passed on friends close to me and my heart.
I simply open the case and place the passed insect inside. Done.
Memories to keep forever.
 
I am still trialling this method. It works well with jumping spiders and medium sized mantis. 
Anything large such as an Asian has not yet worked, possibly due to abdomen size.