Banding!!! DX2 Printhead Help!!!!

Does anyone know where to purchase new DX2 printheads? In need of 2 ASAP so hoping there is some place in the US. I have purchased 4 in the last 2 months refurbished from ebay and have serious banding on everything I print. Some nozzles on all 4 of the printheads don't fire. 1 completely didn't work. Could this be a head rank issue or the need for a new printhead????

I've flushed out each printhead and the perform the same. I did not change any head rank setting when I replaced because I was not able to find the head ranks, but reading about the head ranks it doesn't effect the printing too much but the banding is horrible...see picture.

 

$120ish but price doesn’t matter if I can find a reputable supplier

 

It varies. I can get pic tomorrow. Half nozzles work for black. All work for Cyan and Magenta. LC,LM,Y is about 3/4 most of the time. I’ve drawn ink down the waste tubes to get any air out of the lines if there was any. I have a CJ500 converted to SC500. Tried yesterday for about an hour to get it into service mode to try to calibrate the feed but it was so stubborn and only went into service report not service mode. Will try to get to service mode tomorrow.
Glad to know I have been thinking I the right track! Thanks!