I actually have an old nostromo but am looking for something better. I found one item, it looked kind of interesting, but I'm not completely sold on it:

https://www.amazon.com/ACGAM-Bluetooth-Wireless-Controller-Cardboard/dp/B01NACKLKO/ref=pd_sbs_200_5/146-0088854-6916708?_encoding=UTF8&pd_rd_i=B01NACKLKO&pd_rd_r=8d334068-35cc-4a64-91d7-2864f21b769c&pd_rd_w=05Tuf&pd_rd_wg=v4SVO&pf_rd_p=52b7592c-2dc9-4ac6-84d4-4bda6360045e&pf_rd_r=15AGY3M3B1TNYYHXSWQ4&psc=1&refRID=15AGY3M3B1TNYYHXSWQ4

I've found other stuff, but they're super expensive. This is one of the cheaper models I've found:

https://www.amazon.com/Razer-Tartarus-Progammable-Detachable-Mecha-Membrane/dp/B07754PYFK/ref=sr_1_14?keywords=one+handed+pc+controller&qid=1572711565&sr=8-14

But I've since started searching for a gaming mouse. I found this one. Any idea if it's a good model:

https://www.amazon.com/UtechSmart-Precision-Programmable-Computer-Recommendation/dp/B00FNKMVUO/ref=pd_bxgy_147_2/146-0088854-6916708?_encoding=UTF8&pd_rd_i=B00FNKMVUO&pd_rd_r=c069735c-a5fc-4d03-8667-ba13661de586&pd_rd_w=q0TPW&pd_rd_wg=2W5Cs&pf_rd_p=09627863-9889-4290-b90a-5e9f86682449&pf_rd_r=RBX90DJXXBHR6VVNYJHP&psc=1&refRID=RBX90DJXXBHR6VVNYJHP

Try amazon smile to donate to a charity of your choice automatically at no cost to you!
https://smile.amazon.com/Gaming-Mouse-UtechSmart-Venus-Precision/dp/B00FNKMVUO/ref=sr_1_3?ie=UTF8&qid=1526251170&sr=8-3&keywords=12+button+mouse
^{I'm a bot and this action was performed automatically.}

Here's my set up after loosing 2 fingers on left hand: Stinky gaming footboard, UtechSmart gaming mouse, and Logitech Gaming pad with joystick for wasd The G-13 has been the biggest help for me in FPS, but for racing games it sucks, I have to switch back to the keyboard. I don't use the footboard as much though. Hope one of these or similar helps bro.

I use the Razer Naga 2014. The mechanical side buttons feel really nice to use. Razer's "Synapse" software works decently well with Mac, as you can bind any button to a multitude of functions. The only issue I've run into is that the OS-level mouse tracking seems to reset to 0 on reboot. Not a huge issue. I would definitely purchase this mouse again if mine were to ever go up (had it for about 11 months now with no issues.)

The Logitech G600 has decent reviews, although I didn't go with it because a) the side buttons are squishy, and b) the software only works in Windows, so if you want to rebind keys to something else, you're out of luck.

A cheaper option is the Redragon Perdition, which is a newer "MMO mouse." I couldn't verify, but I don't believe this one has any Mac software either. However, the buttons are still just numeric keys, so if you don't need anything crazy, it should be fine. You can also store the button profiles on the device, so if you have a Windows install, you can apply it there then use it in OS X.

There's also the UtechSmart Venus. Not bad reviews; fairly new; cheap. Like the two previous mice, I don't believe it has any Mac software, but the extra buttons will still function.

Mouse: https://www.amazon.com/Gaming-Mouse-UtechSmart-Venus-Precision/dp/B00FNKMVUO/ref=sr_1_3?ie=UTF8&qid=1526251170&sr=8-3&keywords=12+button+mouse. (Q,W,E,R)=(1,2,3,4) (5)=Smite (6)=Flash (Scroller)= Ward Hop