There is Acetone (Dimethyl ketone) Peroxide,
There is Methyl Ethyl Ketone Peroxide,
What of Diethyl Ketone Peroxide.
It has to be more stable, but does it posess any explosive properties and how can I make it?

Why are you so sure its more stable? You haven't made it!

Preparation will be more difficult than with AP since diethyl ketone is not very soluble in water.

DiEK is highly unstable.

So unstable, in fact, that this newbie blew himself into HED by posting this as a first question.