I recently discovered the awesome CZ Scorpion EVO 3 S1 pistol (CZ makes a select fire version as the A1 subgun) and all the cool things about it.
For one, Franklin Armory makes a binary trigger for it.
You can find the Scorpion EVO 3 S1 for sale online for $799 plus shipping and transfer fees, or perhaps find one for sale locally in the secondary market.
There are several mods you may be interested in, including an extended mag release, an extended charging handle, aftermarket handguard such as the one offered by HB Industries, an improved pistol grip, a light/(green) laser, red dot sight or EOTech, flash hider to replace the OEM FH, and most importantly an arm brace such as the one offered by Manticore Arm/SB Tactical in the form of the CZPDW. Oh, and of course the Franklin Armory binary trigger. If you install the Franklin binary trigger then Franklin furnishes the safety selector replacing the OEM safety. The OEM safety is an issue regardless of one being a right handed shooter or a left handed shooter since due to the angle of the grip when the safety is in the fire position it digs into one's index finger - there are a number of aftermarket solutions for this if one doesn't install the Franklin binary trigger.
This is where I would post an image, so (wow an image actually posted!) the CZ Scorpion in the above video is the Micro version, I have the 7.7" barrel version like the one below.