As of right now the White Streak pistol can't be edited unfortunately :( I have also tested a few things with the Deagle but as you stated, it doesn't quite fit it well but I have a few ideas for a skin that the Deagle would look nice in but first I need to improve my graphic design skills so I may be more creative with the skins I am creating and as for the Interceptor I will look into making an Operator variant for it :)

Really like this approach to handguns. In my opinion, the tactical-stainless style would just not fit a Deagle very well, however, the White Streak Pistol might look a lot better in this colour. Also, the HK USP (forgot the name) could use a stylish workover as well!

Just putting in some ideas, keep going. Im a fan!