Jack, PM either Jezza@HDTCQ (Jeremy in Cairns) or doubledip (Justin in Sydney) on here. They're both the experts at this stuff and Justin got an E3 dash working in my MY9.5 SSV ute when I sent the cluster up to him in Sydney and I gather the E3 cluster is the trickiest of the lot to get working in a non HSV car by a fair bit. Word of warning though, they're both extremely busy and may take a while to respond to PMs as they get millions .......
If no luck with PMs try Justin through his website (http://www.ultimateconversionwiring.com.au/) and Jeremy through theirs (http://www.hdtcq.com.au/).