Majsta we use Sullins. They are the best you will find. If you are going to build an A1200 accelerator and want a reliable connector this is who you need to use. The only option will be to reflect the price you have to pay per connector in the end unit price. Its worth it, trust me.
If you go with some Chinese manufacturer you may get some tin junk for a lot less, but the reliability of the main connection of the accelerator and everything on it is at risk. Why go that why?