Another ECU-GAUGES-RED KEY problem...

[ducapista]

Greetings,

My bike is an m620 2004 and i have a few problems here so i desperate need your enlightenment.
Mechanically the bike runs great but my gauges are totally broken (externally and internally) and i have no red key.
What are my options here? What is the connection between ecu,gauges and red key?

1. If i put a DP ECU then can i also get used gauges from eBay and having them work without the red key?

2. If i "find" a red key, can i use it to put gauges from eBay?

3. Can i get gauges from eBay and replace internal chip with my current one?

4. Can i put gauges from S2R or S4R if i cant find from m620?


All answers will be very much appreciated and help me run my bike again without worrying how fast im going, how high are revs and the oil temp...

Thank you in advance... (Of course i will provide you with info from all the steps i will take)