all the CZ models I have shot/owned have a very simple mag release that can be flipped upside down to the other side of the gun( reversible). I have actually switched mine because my thumb could not reach the release w/o changing my grip, so I just use my index finger now and all is well. I didn't even know about the 85, but it appears everything is either ambi or reversible. I think that's your ticket, being fully ambi is awesome, but the good doesn't just stop there, it's also the best defensive pistol on the planet IMO. I lost track at over 5000 rounds without ever having a single malfunction, this mirrors from my branded cz-75 that's old as dirt to even my 300$ cz clone(Tri-Star), absolutely amazing reliability/accuracy and by far my favorite trigger ever. I am not sure what an 85 will cost you over a CZ 75 SA, but since you can carry the 75 SA chambered with hammer down w/o any chance of discharge w/o cocking first, that would be another option since the safety would be meaningless if carried hammer down and mag release is of course still reversible.
not a bad price for the 85 combat, the slight more money over the standard 75 seems to be worth it for the sights and what appears to be a polished barrel.
http://www.budsgunshop.com/catalog/...1648/CZ-USA+01210+CZ+85+Combat+10+1+9mm+4.61"
so, the problem is, CZ doesn't appear to offer any compact/PRC models for ambi use or conversion. that's disappointing, but the CZ Rami Polymer is said to have and ambi safety, these are great carry guns and sport a fair price of 450 or less last I have seen. I cannot confirm or deny they truly have abi safteys, you'll have to research that.
i have "heard" that you can switch the safttey on the tangfolio line of witness guns. very nice CZ type pistols that have a great reputation. but this is all just because i think life is to short not to own a CZ type pisol. their are some nice realistic options out ther for lefty's, Ruger SR9 and Ruger P95, true ambi pistols, SR9 is affordable and not too terribly large for carry, the P95 is probably the mot affordable ambi pistol out there but it is very lare. obviously any glock is going to be truly ambi w/o having a safety in the first place, who really cares about the slide stop.
the SR9c comes in a nice compact version as well, still including the ambi controls, this would be a great choice and am pretty sure is sold with sub 15 round mags.
https://www.budsgunshop.com/catalog/product_info.php/products_id/62287
http://slickdeals.net/f/4002830-gun-ruger-p95-9mm-stainless-304-99-shipped-kentucky-gun-company