Your two best options are:
-HKS Camp 2 which plugs directly into your navigation and OBD2 and will not cost $2k I can bet you that. The system was around $600 and each additional cable reader is $150-$200 and the install was quick (probably an easy DIY if you want).
-Replace the 3 gauges in the dash, this just requires taking out the dash which is probably half a days work for a shop and then mounting them, waiting for it to set and put the dash back in.
Neither options is cheaper or more expensive than the other, but both provide the best solution for having aftermarket gauges for forced induction.
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