I can't help you, but I'm interested to see what you come up with. I ended up buying the small Garmin friction mount for my nuvi, and I'm happy with it but I'd like to see something a bit less temporary.
'12 SE Sport 5Dr |╠╬╝|Sterling Grey Metallic|203a|Moonroof|17" Mach/Paint Whls|K&N Typhoon|MS3 RMM|Steeda STB, RSB
'01 ZX3|╠╬╝|Pitch Black|Prem. pkg.|Moonroof|SVT Snorkel|SVT Springs|S2 Dampers|Steeda STS|Magnaflow exh.