They were all printed on Shapeways, and should be available to the public.
Shrapnel:
![Image](http://i398.photobucket.com/albums/pp63/tresobyr/3D%20Models/shrapnelgun_zps5nmz3cbo.png)
Bombshell (as based on the G1 cartoon):
![Image](http://i398.photobucket.com/albums/pp63/tresobyr/3D%20Models/bombshellgun1_zpsuwsq05sn.png)
Generic Mini-bot blaster (based on the episode where Swerve gets stomped on by Trypticon):
![Image](http://i398.photobucket.com/albums/pp63/tresobyr/3D%20Models/genericminipistol_zpspug13jen.png)
Upscaled kreon blaster (made on request):
![Image](http://i398.photobucket.com/albums/pp63/tresobyr/3D%20Models/bumblebeegun1_zpsqj0x7h4e.png)
Thanks for looking! More images to come!