1982 non-turbo 5spd zx

After fixing a leak in one of my fuel injectors recently (cracked mounting block), the same injector has begun leaking again. (I replaced all of the inner, smaller "O" rings at that time). This time I'm pretty sure it is the injector itself.

I've had some Z owners warn me to only by Nissan injectors, but I know they cost a small fortune.

What would the advantages of Nissan injectors be?

Which aftermarket brand is best (are there any to stay away from?)? Where can I buy them?

Thanks!

 

Best after market that I know is RC injectors. Or Venom