Hello Ron L here = Seresurplus
The Romanian serises of AK Clones is no different than many other AKs of other Origin, Trigger group parts from many other AK series of rifles should be found and substituted, what is your SAR-3 doing or Not doing, than makes you believe it's the trigger group? If you tell us that or Gop to AK-47.COM I'm sure we can recommend parts to swop out, if you get US parts as well, it helps your legality in many states? Let us know OK? I bet we can Help ya?