my vz.58 mosfet has recently give up the ghost and cant find any in stock anywhere. is there any other brands that will fit apart from the psj ones as there are also out of stock everywhere thanks
Unfortunately, being Ares, their EFCS is proprietary along with the gearbox shell. Either buy it from abroad or send customer support a mail.
As an alternative, you could hand it to a tech to see if a standard v2 shell fits, in that case you'll have way more options available when it comes to mosfets and FCUs.