So I'm taking out my turbo and broke part of the OEM EBCS as I was removing it, should I spend 70 on a replacement OEM one or go for a grimmspeed 3port
You can probably find an OEM one used for a decent price. There's no reason to upgrade to a 3port ebcs on stock turbo, unless you're planning on upgrading the turbo down the line the may aswell, keep in mind you'd want to run it in 2 port mode not 3 port unless tuned iirc.
Can be had off ebay as a generic 3 port mac valve for had for 30 dollars. Just solder your old broken EBC connector onto the wires. I have been running this on my Miata for years without issues. They sell a mounting plate on Ebay for about 15 dollars. Half the cost of grimmspeed or Cobb.